RARE COLLECTOR GEMSTONES
(2011 , first update)

Investment Gem Vault

(Rare Colored Gemstones)

Investment Gems…  We are proud to offer a selection of fine gemstones. Investment-grade gems are those that are unusually large or of fine quality for the species -- the type of specimens that standout and have a strong demand among serious collectors and investors alike. But unlike other types of collectibles like stamps or art, gemstones can be worn and enjoyed throughout generations, and as an asset group they have been trusted to hold their value extremely well for thousands of years (particularly in inflationary times).  Fine gems make excellent display objects as additions to traditional collections of crystallized minerals (“rough-and-cut” sets), and can obviously be used to create unique jewelry.  With help from our friends in the wholesale gem trade, The Arkenstone is proud to announce another update offering collector and investment stones on consignment from reputable sources in the trade. All are guaranteed for authenticity and quality, by our company .

 These updates will be continuing throughout the year as we can obtain special lots from wholesale sources within the gem trade, that we think have broad appeal to collectors and investors.

NOTE about photography:  photos have not been photoshopped or otherwise altered to enhance color or lustre. These stones are "better in person" because the photography is a high resolution standard we use now for minerals, and the small gems are being blown up to a huge magnification, which shows more flaws than the human eye can see. One should consider these photos as if looking through a 10-20X loupe at the gems.

 


US$    € EURO    ¥ YEN    £ POUND    CAN$    AUS$   

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GEM11-46 - Peridot (set of rough and gem) - $ 5000
St John's Island (Zagbargad; Zabargad or Topazios in ancient times), Red Sea, Egypt

thumbnail, 9 x 6 mm; 3.04 cts
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Peridot (set of rough and gem) from St John's Island (Zagbargad; Zabargad or Topazios in ancient times), Red Sea, Egypt [db_pics/new2011/PERIDOT-ROUGHCUT-STJOHNSISLAND-REDSEA-G46-2.jpg]

One of our favorite gems in the entire update. The rough is a very rare, fat, transparent gem crystal of peridot from the original famous locality dating back to ancient Egyptian times. The "emeralds" of Cleopatra were actually peridot from this locality, most people believe now! Large crystals of this size (2.2 x 2 x 1 cm) are uncommon and hard to obtain - and this is one of the largest such we have seen on the market, at any time or place. Now, the mine is underwater and specimens only turn up from old museum collections. The color is a characteristic limey green with a hint of yellow compared to Pakistani peridot, and the habit here is typical of the old style. The gemstone is also from Egypt, an incredible peridot that is among the finest we have ever seen of the sort. This is from a Bonhams Auctions estate sale -- a round brilliant stone of the finest "olive green" color. Moreover, the gem is clean and exceptionally bright. It is a top grade collector or jewelry stone, and an impressive and important gem from a classic locality. It is complemented by a significant sized gem crystal: A "rough-and-cut" set for the most discerning collector who appreciates historic pieces as well. see MINDAT for more information on this locale: www.mindat.org/loc-6423.html


GEM11-45 - Rhodochrosite - $ 7200
N'Chwaning II Mine, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa

thumbnail, 15 x 11 x 7 mm; 9.41 cts
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Rhodochrosite from N'Chwaning II Mine, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/new2011/RHODOCHROSITE-NCHWANING-9-41CTS-G45-4.jpg]
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Rhodochrosite from N'Chwaning II Mine, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/new2011/RHODOCHROSITE-NCHWANING-9-41CTS-G45-6.jpg]

An absolutely superb and irreplacable rarity because of its size and quality, this gem dates to the few pockets of large crystals found in 1978-1980. Cut by Spectrum Award-winning cutter Mark Kaufman, this rich red gem is an impressive oval that has remarkable presence in person and more internal brightness than you would expect for often-sleepy rhodochrosite gems. The polish is amazing , highly glassy. Another top quality collector's stone suitable for any sophisticated collector or a rough-and-cut display. Clean and bright and an excellent value in today's market.


GEM11-44 - Sapphire color suite - $ 1500
Sri Lanka & Burma

thumbnail, 5 x 4 mm; 7.78 cts
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Sapphire color suite from Sri Lanka & Burma [db_pics/new2011/SAPPHIRES-7-78TCW-G44-2.jpg]

A fun set of 17 oval cut sapphires, in almost every color range, from Sri Lanka and Burma. Attractive as a mini-gem collection - or could be used to make a wonderful "sapphire rainbow" piece of wearable jewelry. We really like this one and highly recommend it for the price. Good cuts and excellent color saturation in these stones. And , all are natural untreated stones (assembled by semi-retired dealer Herb Obodda from his old dealer stock).


GEM11-42 - Rhodolite Garnet - $ 925
Tanzania

thumbnail, 14 x 11 mm; 9.69 cts
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Rhodolite Garnet from Tanzania [db_pics/new2011/RHODOLITE-TANZANIA-9-69CTS-G42-3.jpg]

A sizable and cute oval cut gem of classic, deep red color. Contemporary and for some reason not valued as highly as other garnet species, so an inexpensive stone to start a gem collection or a rough-and-cut display. Also, being a garnet, this stone can be used for any wearable jewelry application.


GEM11-40 - Moldavite - $ 225
Moravia, Czech Republic

thumbnail, 13.5 mm; 6.42 cts
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Moldavite from Moravia, Czech Republic [db_pics/new2011/MOLDAVITE-CZECH-6-42CTS-G40-7.jpg]

Moldavites are a gemmy tektite from Czechoslovakia. They used to be a mineralogical mystery, but scientists now tend to believe they are an impact material formed from a meteorite scorching the earth and launching melted fragments into the air. It is technically a green natural glass, formed from fused earth, in other words. The impact of a meteorite in Bavaria 15 million years ago (the present Ries crater) has thus yielded us a unique gem: They are fascinating naural objects and make very unique and pretty collector's stones. This is a rounded brilliant cut of good size. The stone is clean, and really shows off the deep green color. Classic material and a real conversation piece. Relatively inexpensive too!


GEM11-39 - Opal - $ 3900
Tsehay Mewcha, Wollo, Welo Province, Ethiopia

thumbnail, 22 x 14 x 10 mm; 15.50 cts
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Opal from Tsehay Mewcha, Wollo, Welo Province, Ethiopia [db_pics/new2011/OPAL-ETHIOPIA-15-5CTS-G39-2.jpg]
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Opal from Tsehay Mewcha, Wollo, Welo Province, Ethiopia [db_pics/new2011/OPAL-ETHIOPIA-15-5CTS-G39-4.jpg]

A very beautiful and impressive opal� it has an almost etheral quality to it. Unlike most opals with a white base or background color, this pear-shaped, double cabochon (polished on BOTH top and bottom so it can be displayed from either side) has a gorgeous yellow color and a stunning watery look that is dominated by a stupendous flash of colors across the entire face of the gem. It is riveting in person, characteristic of the very best quality of this new material from a small find in Ethiopia. Recently the material has been picked up by major worldwide gemstone companies and incorporated into very high-end masterpiece works. This is a museum class stone that is both wearable and collectible, and I think an investment as stones from this locality gain traction in the market. Also, nobody knows the size of the deposit - it cannot last forever, and then we are back to the more expensive Aussie opals of standard fashion. .Welo Opal is the only true stable opal that is mined in Ethiopia, according to many people who have handled it for the last 2 years as it trickled out. This opal has amazing fire play of all different colors. The Welo Opal is a very hard opal and thus very wearable.


GEM11-36 - Phosphophyllite - $ 25800
Unificada Mine, Cerro de Potosi, Potosi City, Potosi Department, Bolivia

thumbnail, 18 x 9 x 6 mm; 10.32 cts
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Phosphophyllite from Unificada Mine, Cerro de Potosi, Potosi City, Potosi Department, Bolivia [db_pics/new2011/PHOSPHOPHYLLITE-BOLIVIA-10.32CTS-G36-4.jpg]
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Phosphophyllite from Unificada Mine, Cerro de Potosi, Potosi City, Potosi Department, Bolivia [db_pics/new2011/PHOSPHOPHYLLITE-BOLIVIA-10.32CTS-G36-7.jpg]

One of the largest gems of this rare species that we have seen on the market, with certainly only a few larger in institutional and major private collections. It shows the unique light, bluish green color and saturation, that only phosphophyllites from the old finds of the 1940s-1950s have. These are spectacular stones for the species and are highly recommended for top collections both for the beauty and for their proven investment ppotential over time. We feel there is strong upside for these gems, as the few remaining great crystals out there will tend to be preserved at the prices they currently command, making large stones like these very rare commodities. In the past, surviving crystals were readily cut as the gems were worth more, before the modern mineral specimen market. These are absolutely stunning in person! I am not normally into faceted gems, but when they get this rare and this gorgeous, and merge with mineralogical rarity, how could i say no? I am told confidently by two well known gem trade experts that this is the biggest and best phospho cut gem on the market in years and is certainly among the top cut phosphos known to exist. It is an old stone, cut decades ago and long stashed away with the specimens in a prominent mineral collection. This is an IMPORTANT collector piece and , without a doubt, an investment-grade gem. It is as nearly clean as you can ask for in such large stone of a rare species, and it was recut to modern standards by Spectrum-Award winner Mark Kaufman for me. THERE IS NO COLOR IN MINERALS OR GEMS LIKE THAT OF A PHOSPHO!!! Smaller stones cut from the same old hoard recently sold out, at Tucson a few years ago, at $2500 per carat. Wholesale.


GEM11-35 - Phosphophyllite - $ 24500
Unificada Mine, Cerro de Potosi, Potosi City, Potosi Department, Bolivia

thumbnail, 21 x 11 x 6 mm; 10.22 cts
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Phosphophyllite from Unificada Mine, Cerro de Potosi, Potosi City, Potosi Department, Bolivia [db_pics/new2011/PHOSPHOPHYLLITE-BOLIVIA-10.22CTS-G35-6.jpg]
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Phosphophyllite from Unificada Mine, Cerro de Potosi, Potosi City, Potosi Department, Bolivia [db_pics/new2011/PHOSPHOPHYLLITE-BOLIVIA-10.22CTS-G35-10.jpg]

The holy grail of mineral collecting is also a high sought after collector's gem! And this is one of the largest gems of this rare species that we have seen on the market, with certainly only a few larger in institutional and major private collections. It shows the unique light, bluish green color and saturation, that only phosphophyllites from the old finds of the 1940s-1950s have. A small amount of modern material from new find shere, cannot compete. These are spectacular stones for the species and are highly recommended for top collections both for the beauty and for their proven investment ppotential over time. That said, clean and gemmy stones tend to be very small. This is why our two gems are important standouts. This is a huge, light bluish-green gem that is super brilliant and lustrous, and nearly clean except for only a few tiny veils that our hyper-sensitive camera picks up much more readily than the human eye. A museum piece to be sure! It is an old stone, cut decades ago and long stashed away with the specimens in a prominent mineral collection. This is an IMPORTANT collector piece and , without a doubt, an investment-grade gem. It is as nearly clean as you can ask for in such large stone of a rare species, and it was recut to modern standards by Spectrum-Award winner Mark Kaufman for me. THERE IS NO COLOR IN MINERALS OR GEMS LIKE THAT OF A PHOSPHO!!! Smaller stones cut from the same old hoard recently sold out, at Tucson a few years ago, at $2500 per carat. Wholesale.


GEM11-33 - Rhodochrosite - $ 4800
Sweet Home Mine, Alma, Park County, Colorado

thumbnail, 17 x 9 x 8 mm; 8.61 cts
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Rhodochrosite from Sweet Home Mine, Alma, Park County, Colorado [db_pics/new2011/RHODOCHROSITE-SHM-8-61CTS-G33-6.jpg]
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Rhodochrosite from Sweet Home Mine, Alma, Park County, Colorado [db_pics/new2011/RHODOCHROSITE-SHM-8-61CTS-G33-8.jpg]

Classic material from a classic, but now closed, locality ! Rhodochrosite is typically regarded as among the most beautiful of mineral specimens� and its legendary color make it a spectacular gem. This is a rather large-sized stone in an attractive marquise cut. The photos, although accurate, don't do this rare collector's gem justice because the camera enhances flaws that the human eye does not spot as readily. It is a super bright jewel of a gorgeous red-pink color. The gem is also exceptionally clean for the species and location (again, given the size, some internal flaws are acceptable. And the over-accuracy of the high-resolution professional photography enhances those small flaws which in person are not so obvious). In sum, this is a very "sweet" stone of exceptional size and quality. A must for any serious rough-and-cut set, or collection of connoisseur gems. They can only go up in value ow that the mine is closed, and few large stones of this size were ever available even in its heyday. Cut by Paul Cory.


GEM11-31 - Benitoite - $ 7500
Dallas Gem Mine, San Benito County, California

thumbnail, 8 x 6 x 5 mm; 2.16 cts
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ex.  Bill Forrest

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Benitoite from Dallas Gem Mine, San Benito County, California [db_pics/new2011/BENITOITE-CALIFORNIA-2-16CTS-G31-2.jpg]
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Benitoite from Dallas Gem Mine, San Benito County, California [db_pics/new2011/BENITOITE-CALIFORNIA-2-16CTS-G31-5.jpg]

Benitoites of excellent gem quality and transparency rarely exceed two carats, and few that do have such good color saturation combined with the gemminess. Most stones tend to have one or the other. This is an impressive brilliant oval that is very bright and has good clarity as well. It is big and impressive. Rough-and-cut sets make fabulous displays and this would fit into such a set, or it is of a hardness that makes it also perfectly wearable for jewelry. It will look like a sapphire in color with the brightness of diamond, in a setting. A classic rarity that will be difficult to replace as the deposit is unique in the world, and is now more or less stripmined and depleted. From the collection of former mine owner Bill Forrest. We have seen quotes on pieces of this quality , and size, at $10,000 per carat retail.


GEM11-29 - Pezzotaite - $ 3000
Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar

thumbnail, 8 x 7 x 5 mm; 1.95 cts
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Pezzotaite from Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar [db_pics/new2011/PEZZOTTAITE-MADAGASCAR-2-75CTS-G28-1.jpg]
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Pezzotaite from Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar [db_pics/new2011/PEZZOTTAITE-MADAGASCAR-2-75CTS-G28-2.jpg]

This is a new species of gem red beryl, found only in 2002 and brought to market in limited quantity. No more material has been found since around 2005 and there is little wholesale reserves. So it's now difficult to find gem-quality crystals of this rare cesium-rich member of the beryl group, and it's arguably rarer to source truly fine gems of this species in today's market. We are excited to offer three important example. Our favorite gem of the suite: Simply a "killer" gem in all regards -- highly recommended for a fabulous piece of jewelry (and what a conversation piece) or to reside as an important addition to a connoisseur collection. This oval brilliant has gorgeous purply pink color and shows top brightness and clarity for the species. That slight hint of purple tone (visible in the side shot) separates the top quality pieces of rough, in this species, and is considered very rare. Just a spectacular and rare collector's gem!


GEM11-28 - Pezzotaite - $ 6500
Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar

thumbnail, 9 x 7 x 6 mm; 2.75 cts
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Pezzotaite from Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar [db_pics/new2011/PEZZOTTAITE-MADAGASCAR-1-95CTS-G29-1.jpg]
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Pezzotaite from Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar [db_pics/new2011/PEZZOTTAITE-MADAGASCAR-1-95CTS-G29-5.jpg]

This larger gem is a somewhat "rounded" rectangle cut. The stone is reasonably bright and clean, but the notable feature is the very deep pink color. Clearly, the most saturated gem of the suite and a highly desired color that is unique to this beryl species. A great choice for a rough-and-cut set, or a standout piece of jewelry. In fact, the high beryl hardness make it suitable for almost any jewelry use


GEM11-27 - Pezzotaite - $ 2400
Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar

thumbnail, 7 x 7 x 5 mm; 1.83 cts
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Pezzotaite from Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar [db_pics/new2011/PEZZOTTAITE-MADAGASCAR-1-83CTS-G27-6.jpg]
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Pezzotaite from Sakavalana mine, Ambatovita, Fianarantsoa Province, Madagascar [db_pics/new2011/PEZZOTTAITE-MADAGASCAR-1-83CTS-G27-9.jpg]

This is a new species of gem red beryl, found only in 2002 and brought to market in limited quantity. No more material has been found since around 2005 and there is little wholesale reserves. So it's now difficult to find gem-quality crystals of this rare cesium-rich member of the beryl group, and it's arguably rarer to source truly fine gems of this species in today's market. We are excited to offer three important example. This "rounded square" cut shows a very nice pink color. It is wonderfully bright, clean and only slightly included by pezzotaite standards (most stones, like emeralds, have some inclusions). Brightness, transparency, and overall fine quality make it a superb stone.


GEM11-26 - Demantoid Garnet - $ 8250
Ural Mountains, Russia

thumbnail, 8.27 x 6.81 x 5.71 mm; 2.67 cts
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Demantoid Garnet from Ural Mountains, Russia [db_pics/new2011/DEMANTOID-RUSSIA-2-67CTS-G26-4.jpg]
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Demantoid Garnet from Ural Mountains, Russia [db_pics/new2011/DEMANTOID-RUSSIA-2-67CTS-G26-6.jpg]

Classic location for the classic material of this gem species ! This is a very respectably size example of demantoid in a brilliant oval cut. It's a handsome stone that is highly desirable for its "horsetail inclusion" which both prove the species and the natural state of the stone. The color saturation is deeper than the new finds of Madagascar material we premiere above, but then again the price for these rarities has always been high due to market demand as they are considered to be "the best". Every gem connoisseur should have a representaive example, and this one is a beauty that is big enough to be investible and large and sturdy enough to be wearable as well.


GEM11-20 - Demantoid Garnet (new find) - $ 1350
Antetezambato, Ambanja District, Antsiranana Province, Madagascar

thumbnail, 8 x 8 x 5 mm; 2.47 cts
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Demantoid Garnet (new find) from Antetezambato, Ambanja District, Antsiranana Province, Madagascar [db_pics/new2011/DEMANTOID-MADAGASCAR-2.47CTS-G20-5.jpg]

This "modified trilliant" brilliant is an important gem. It is the largest type of this quality from the stash that I was shown at Munich; and it is perfect for a display, investment or jewelry. Bright and nearly eye-clean (the camera picks up more than the eye does), and we can't emphasize enough the wonderful, almost neon-like brightness and color. Choice stone for the connoisseur. From the cherry-picked collection assembled during several years of excavation by Dr. Federico Pezzota, discoverer of Pezzotaite and the man who handled the most of these demantoids as well, we are proud and privileged to offer this unique lot of gems cut from a modern day classic find : world-class demantoids from Madagascar.



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Rob Lavinsky, rob@irocks.com

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