RARE COLLECTOR GEMSTONES (fall 2010 update)


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RLKG10-129 - Fire Opal / Jelly Opal (rare green color) - $ 1250
near Niquelandia, Goias, Brazil

thumbnail, 14.6 mm ; 10.55 carats
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ex.  Richard Gaines

Fire Opal / Jelly Opal (rare green color) from near Niquelandia, Goias, Brazil [db_pics/new2010/rlkg129a.jpg]Fire Opal / Jelly Opal (rare green color) from near Niquelandia, Goias, Brazil [db_pics/new2010/rlkg129b.jpg]
Fire Opal / Jelly Opal (rare green color) from near Niquelandia, Goias, Brazil [db_pics/new2010/rlkg129c.jpg]CLICK HERE FOR LARGER IMAGE:
Fire Opal / Jelly Opal (rare green color) from near Niquelandia, Goias, Brazil [db_pics/new2010/rlkg129d.jpg]

A rare and unique color and occurrence for Opal unlike anything I have seen from Brazil, or virtually any other world locality. This stone was cut from a single piece of rough that was collected circa 50 years ago and was once part of the famous Richard (Dick) Gaines collection and we were fortunate enough to have a photo of the original piece of rough with Gaines' collection label. Green Opal is certainly rare, and to find vibrantly colored stones like this one is unheard of on the market. This Cut Corner Square cut stone is the largest gem I have seen of this material, and would make a superb addition to any collection, especially an Opal suite, as a stone like this is next to impossible to find even in old collections. Please note that the color of the stone is a bit more green than the photos might indicate, as they show somewhat of a yellow hue.


RLKG10-238 - Calderite (very rare Garnet species) - $ 110 SOLD
Shigar, Pakistan

thumbnail, 4.2 x 2.7 mm ; 0.17 carats
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Calderite (very rare Garnet species) from Shigar, Pakistan [db_pics/new2010/rlkg238a.jpg]Calderite (very rare Garnet species) from Shigar, Pakistan [db_pics/new2010/rlkg238b.jpg]

Calderite is a very rare member of the Garnet group, and is almost never seen in faceted stones. This "Oval" cut gem is translucent, with the typical "burnt orange" hue that is associated with the species, but out of all the Garnets, this one is nearly impossible for collectors to obtain for their collections. It must be noted that this is not a variety, but an actual species (note no cert, but as identified by our knowledgeable source for this gem lot). This stone came to me from a trusted source, and the locality is accurate. If you're a Garnet collector, or simply a rare stone collector, this is a great opportunity to add a richly colored stone of this hard to find material to your collection.


RLKG10-231 - Phenakite - $ 65 SOLD
Madagascar

thumbnail, 5.9 x 4.5 mm ; 0.46 carats
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Phenakite from Madagascar [db_pics/new2010/rlkg231a.jpg]Phenakite from Madagascar [db_pics/new2010/rlkg231b.jpg]

Phenakite is one of the rarer stones out there, and some lesser known Phenakites have come from a few pegmatites in Madagascar. Phenakite is often pale in color, but the stones are usually bright, and they are durable enough to be worn in jewelry. The Phenakites from Madagascar are typically not gemmy enough to cut stones of any significance, so to find a stone of this size from this area is rare to say the least. This stone is a very attractive, nearly colorless (the stone has a very pale yellow hue), very slightly included gem with an Oval cut.


RLKG10-211 - Phenakite - $ 80 SOLD
Madagascar

thumbnail, 6.9 x 5.4 mm ; 0.86 carats
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Phenakite from Madagascar [db_pics/new2010/rlkg211a.jpg]Phenakite from Madagascar [db_pics/new2010/rlkg211b.jpg]

Phenakite is one of the rarer stones out there, and some lesser known Phenakites have come from a few pegmatites in Madagascar. Phenakite is often pale in color, but the stones are usually bright, and they are durable enough to be worn in jewelry. The Phenakites from Madagascar are typically not gemmy enough to cut stones of any significance, so to find a stone of this size from this area is rare to say the least. This stone is a very attractive, nearly colorless (the stone has a very pale yellow hue), very very slightly included gem with an Oval cut.


RLKG10-199 - Iolite (Cordierite) - $ 360 SOLD
Burma

thumbnail, 13.6 x 6.3 mm ; 3.60 carats
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Iolite (Cordierite) from Burma [db_pics/new2010/rlkg199a.jpg]Iolite (Cordierite) from Burma [db_pics/new2010/rlkg199b.jpg]

Iolite translated from Greek literally means "violet stone". These gems are sometimes known as "water Sapphire" in various corners of the gem world, but it is truly gem grade Cordierite. Iolite is strongly pleochroic and shows a strong blue color one direction, a violet color another direction, and a yellowish color in the third direction. This gem is from the Burma, where some of the nicest Iolites are being mined these days. The stone is virtually eye clean with an "Emerald" cut, and shows a good color change when rotated on its different axis. A very attractive, larger stone for the material.


RLKG10-200 - Phenakite - $ 60 SOLD
Madagascar

thumbnail, 6.7 x 5.0 mm ; 0.66 carats
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Phenakite from Madagascar [db_pics/new2010/rlkg200a.jpg]Phenakite from Madagascar [db_pics/new2010/rlkg200b.jpg]

Phenakite is one of the rarer stones out there, and some lesser known Phenakites have come from a few pegmatites in Madagascar. Phenakite is often pale in color, but the stones are usually bright, and they are durable enough to be worn in jewelry. The Phenakites from Madagascar are typically not gemmy enough to cut stones of any significance, so to find a stone of this size from this area is rare to say the least. This stone is a very attractive, nearly colorless (the stone has a very pale yellow hue), very very slightly included gem with an Oval cut.


RLKG10-177 - Phenakite - $ 50 SOLD
Madagascar

thumbnail, 6.9 x 4.6 mm ; 0.52 carats
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Phenakite from Madagascar [db_pics/new2010/rlkg177a.jpg]Phenakite from Madagascar [db_pics/new2010/rlkg177b.jpg]

Phenakite is one of the rarer stones out there, and some lesser known Phenakites have come from a few pegmatites in Madagascar. Phenakite is often pale in color, but the stones are usually bright, and they are durable enough to be worn in jewelry. The Phenakites from Madagascar are typically not gemmy enough to cut stones of any significance, so to find a stone of this size from this area is rare to say the least. This stone is a very attractive, nearly colorless (the stone has a very pale yellow hue), slightly included gem with a Pear cut.


RLKG10-166 - Sapphire - $ 295 SOLD
Thailand

thumbnail, 7.4 x 5.7 mm ; 1.41 carats
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Sapphire from Thailand [db_pics/new2010/rlkg166a.jpg]Sapphire from Thailand [db_pics/new2010/rlkg166b.jpg]
Sapphire from Thailand [db_pics/new2010/rlkg166c.jpg]Sapphire from Thailand [db_pics/new2010/rlkg166d.jpg]

Sapphires is one of those gems that comes in virtually every color of the rainbow. With that said, the most recognizable color of Sapphires by far is blue. I've seen literally every shade of blue known to man exhibited in Sapphires, and they are still some of the most popular, durable, colorful and highly sought after gems on the planet. This stone has a beautiful deep "royal blue" color which shows up in strong light. The stone is virtually free of inclusions and has an "Oval" cut.


RLKG10-161 - Axinite - $ 50 SOLD
Bourg d'Oisans, France

thumbnail, 4.9 mm ; 0.41 carats
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Axinite from Bourg d'Oisans, France [db_pics/new2010/rlkg161a.jpg]Axinite from Bourg d'Oisans, France [db_pics/new2010/rlkg161b.jpg]

Axinite is not often found in clean enough or thick enough crystals to cut fine gems, but when they are cut, they are some of the most beautiful rare stones on the market. These stones are trichroic usually showing distinct purple one direction and a brownish-orange color in another direction. This Round cut stone is a lovely, well cut, nearly eye clean stone from this tremendously historic and well known locality. This locality was the first major locality in the world for Axinite, and produced some of finest, gem quality crystals ever found in the world. Axinite gems are usually heavily included, so when you get a stone like this one, it's a real treat. A nice little rare gem from the type locality for the species.


RLKG10-163 - Star Spinel - $ 1250 SOLD
Burma

thumbnail, 11.5 x 8.5 mm ; 7.01 carats
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Star Spinel from Burma [db_pics/new2010/rlkg163a.jpg]
Star Spinel from Burma [db_pics/new2010/rlkg163b.jpg]Star Spinel from Burma [db_pics/new2010/rlkg163c.jpg]

This is a beautiful and hard to find gemstone. I've seen plenty of Star Sapphires in my life, but Star Spinels are rather rare. These stones are cut when thin, fibrous inclusions are are oriented inside of the Spinel crystal at the correct angle to properly show off the "legs" of the star. When these inclusions are numerous enough to make the stone translucent or opaque, they allow light to be reflected in such a way that a star floats across the top of the stone with movement. It is an amazing phenomenon that is only seen in a few gems around the world. The actual "legs" of the star in this stone are amazingly sharp, with no breaks and excellent consistency throughout. Although all Star Spinels are cut into cabochons, the most amazing aspect of this stone is that it shows a star on several sides of the stone when rotated in a strong light ! The stone also exhibits a rich reddish-purple hue to create a stunning gem. It goes without saying that this is a one of a kind stone, and looks better in person than the photos would indicate, as it is rather gemmy when backlit.


RLKG10-146 - Ussingite - $ 45 SOLD
Russia

thumbnail, 4.5 mm ; 0.21 carats
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Ussingite from Russia [db_pics/new2010/rlkg146a.jpg]Ussingite from Russia [db_pics/new2010/rlkg146b.jpg]

Ussingite is a colorful member of the Sodalite group usually showing a light pink or violet hue. It was named after Niels Viggo Ussing who was a professor of mineralogy at University of Copenhagen. Most Ussingite, despite the pretty color, is translucent at best, and I've only seen a few facetted stones of this extremely rare material This stone is amazingly translucent and has a pleasing purplish-pink color with a standard Trillion cut. Another great rare gem to add to your collection.


RLKG10-147 - Willemite (rare blue color) - $ 100 SOLD
Tsumeb, Namibia

thumbnail, 3.0 mm ; 0.16 carats
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Willemite (rare blue color) from Tsumeb, Namibia [db_pics/new2010/rlkg147a.jpg]Willemite (rare blue color) from Tsumeb, Namibia [db_pics/new2010/rlkg147b.jpg]

Willemite is only known from a few world localities in gem quality material, and some of the finest and most attractive stones that I have seen are those from the storied Tsumeb mine. Willemite from Franklin is known is good-sized stones, but the color NEVER looks like this gem ! The gorgeous light ocean-blue color Round cut gem is unique to Tsumeb to my knowledge, and for rare stone collectors, blue Willemite is certainly a must-have when it comes to completing your collection. This stone is very very slightly included, but the color and rarity of the stone is what makes it so important. I have seen cut stones of this exact material retailing for $1500 per carat on the market, so don't miss out on this great opportunity to snag a COLORFUL rare gem from one of the most prolific localities in the world for a great price. Enjoy !


RLKG10-145 - Apatite (neon) - $ 75 SOLD
Bahia, Brazil

thumbnail, 5.0 mm ; 0.57 carats
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Apatite (neon) from Bahia, Brazil [db_pics/new2010/rlkg145a.jpg]Apatite (neon) from Bahia, Brazil [db_pics/new2010/rlkg145b.jpg]

First off, let me say that this is one of the most phenomenal colors in the gem world. It is very difficult to photograph as it has a very strong electric blue color. It is a good size stone from a lesser known locality in Brazil. In my opinion, these are the BEST blue color Apatite gems that I have seen from anywhere in the world. Please note that this stone has been heated to bring out more of the color, and all of these gems are heated, so it is a very well known practice that is accepted among all dealers and collectors in the hobby. This Round cut gem has one of the most attractive and electric colors for Apatite that I know of. I would like to point out that the color in person does not look exactly like the pictures, but that neon hue is almost impossible to duplicate with the camera.


RLKG10-143 - Mansfieldite (rare) - $ 50 SOLD
Algeria

thumbnail, 7.6 x 5.8 mm ; 1.17 carats
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Mansfieldite (rare) from Algeria [db_pics/new2010/rlkg143a.jpg]Mansfieldite (rare) from Algeria [db_pics/new2010/rlkg143b.jpg]

Mansfieldite is a rare Arsenate that forms a series with the better known mineral Scorodite. The material is rarely seen in any capacity on the market today in faceted stones. This particular stone is an Oval cut gem that is virtually opaque with a light greyish green color. Honestly, I've seen very few of these stones, and I think it would be a great rarity to add to any collection despite the fact that it's opaque. This is certainly the largest Mansfieldite that I have had to offer in the galleries.


RLKG10-144 - Dumortierite - $ 50 SOLD
Madagascar

thumbnail, 2.6 mm ; 0.08 carats
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Dumortierite from Madagascar [db_pics/new2010/rlkg144a.jpg]Dumortierite from Madagascar [db_pics/new2010/rlkg144b.jpg]

Dumortierite is a rather rare gem, and is only found in a few world localities in facettable material. This stone is from a lesser known locality in Madagascar. The color of this stone is a yellow green shade, and is nearly eye clean with a Round cut. I've only seen a few of these stones over the years, and rarely are they completely eye clean, even in smaller stones. This gem is a great rarity indeed, and would make a brilliant additional to any rare stone suite.



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Rob Lavinsky, rob@irocks.com

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