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Often times, one encounters Citrine gems on the market that were heated to turn them yellow. Typically these stones start out as natural Amethyst and are altered to create the yellow color. This stone is more than likely a heated gem that was once Amethyst. With that said, this stone is very good size, with great color saturation and unique cutting. It is virtually eye clean with a "Modified Marquise Twist Top" cut.
A very attractive matrix Pederneira specimen, with a classic 5-cm multicolored tourmaline jutting out from behind a gemmy, doubly-terminated quartz crystal. It can be displayed either horizontally or with the crystal vertical (not shown but you get the idea) . Other quartz crystals and platy albites decorate the lepidolite matrix. There is one clean repair on the tourmaline behind the quartz, where it cannot be seen anyhow; but of course, nearly ALL Pederneira pieces have at least one repair – most, more than that – so it is not considered a detraction. Overall, this is a tremendously aesthetic specimen for the size and price range, which I was surprised to be able to buy and sell for under $2000.
ex. Robert Nowakowski
A very rare and large single amethyst crystal from a locality rarely represented in any collections but for old museums. This was, before Mexico, perhaps THE classic locale for large amethyst points in Europe. The crystal has great color and luster , combined with fascinating hoppered pyramid faces that for some reason are not often seen in amethyst (though common enough in smoky quartz). ex Gene & Roz Meieran Collection, through Arkenstone, Robert Nowakowski Collection #RN78. This is a MAJOR amethyst specimen!
ex. Robert Nowakowski
A beautiful encrustation pseudomorph of amethyst crystals after a scalenohedron of calcite, 9-cm long. Much of the calcite is missing now (dissolved away in nature) based on the light weight of the specimen. The crystal form of the calcite was faithfully preserved in teh sparkling amethyst cast, and the specimen is very asthetic overall.
ex. Miguel Romero
This 3-dimensional, very transparent cluster of parallel-growth amethyst crystals sits on a thin crust of matrix. The lustrous and gemmy crystals are subtly graded in color from an intense purple to lavender and to clear tips. The largest crystal is 8.3 cm in length. Lovely cluster, this is typicla of older material from the locality but pieces can seldom be found today in such fine condition. Lustre, and gemminess here, are superb! This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Comes with custom lucite base already made for the specimen.
ex. Miguel Romero
This is a rather exquisite, glassy and gemmy amethyst specimen with the two primary crystals forming a perfect "V" that at first glance one suspects is a Japan Law twin. The lustre is as high as youc an ask for. The intensity of the rich purple color is intensified at the terminal ends of the crystals in a reverse of the more common style, in which tips get lighter. THIS IS A VERY RARE PHENOMENON in vera Cruz amethyst. .The largest crystal measures 4.5 cm in length. The amethyst side-cars add considerably to this lovely specimen, especially the tiny crystal right at heart of the "V". Definitely, a competitive-quality miniature that stands out from the crowd! This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Comes with custom lucite base already made for the specimen.
ex. Miguel Romero
In appearance this galena specimen resembles an oreo cookie with galena on both sides of a calcite layer. Intergrown, splendent crystals of metallic galena form the bottom/matrix of this piece, draped by a vein of colorless, sparkling, calcite crystals. Topping the specimen are large, complexly formed crystals of galena, to 2.5 cm in length. The combination makes a dramatic contrast to display the galena, and a true mineral oddity in its overall appearance ! This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008. Comes with custom lucite base already made for the specimen. Comes with custom lucite base already made for the specimen.
ex. Miguel Romero
Primary malachite is for some reason quite unusual from Mexico, and this is a very attractive example as well. A vug in massive quartz is covered in a druse of gemmy, sparkling, quartz crystals, alternately colored by malachite and perhaps goethite. Sitting majestically at the top of the specimen is a large botryoidal (rounded) cluster of lustrous, dark green malachite, measuring just over 2 cm across. Comes with custom lucite base already made for the specimen. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008.
ex. Miguel Romero
This is an intensely colored, 3-dimensional cluster of converging, lustrous and gemmy, amethyst crystals. They reach to 9 cm in length. All are complete save two minor ones: the two broken crystals, one in the back and one in the lower right-front, are not detracting visually when one considers the whole specimen although the price is reduced accordingly because the two breaks are there, even if discreet. Unlike the Vera Cruz amethyst where the color tends towards more lavender hues, the Guerrero amethyst is more intense in the body of the crystal , truly purple; and this is a classic example. Aesthetic group, from old finds here! Comes with custom lucite base already made for the specimen. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008.
ex. Miguel Romero
An EXTREMELY RARE AND FAMOUS SPECIMEN, this is "the Romero Amethyst twin" to many collectors. It is a freak of nature in that, for some reason, amethyst has not been foud in Japan-law twinning as with its smoky and clear cousins. Nobody knows why. Yet, here is a true twin, precisely measured to confirm the relevant angles and prove the fact (often, apparent twins simply are out of plane and not true twins). It is a pristine, floater crystals considered to be perhaps the finest miniature sized quartz specimen from Mexico by many collectors. Romero obtained this piece in the early 1980s and I hear fro mother colelctors that offers were often made to trade it out of him at very high prices, but were always politely turned down.This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).
ex. Miguel Romero
A superb, arborescent cluster of lustrous and sharp pyrargyrite crystals are here perched on CRYSTALLIZED quartz matrix! THis is an extraordinarily rare occurrence , and a fine specimen from any locality. But for Taxco, where such large matrix pieces are rare, it is even of more import.This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).
ex. Miguel Romero
This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).
Citrine is VERY rare from Russia. We buy all the good specimens we can find, which amounts to only a handful a year, even though we had early access to most of the sources when they came out a few years back. This is a large, spectacular specimen; the crystals are gemmy as can be, with the beautiful and distinctive acid-yellow color peculiar to the best Russian citrines. Small tip dings to the back of the terminations do not visibly detract fomr the display face, or quality overall, of the specimen. Comes with custom-made acrylic base.
While fluorites of this style from Dalnegorsk often appear with quartz, it is very unusual for larger, isolated quartz crystals to be intimately intergrown with the fluorites, as here. In fact, you even have quartz crystals spiking right through the fluorites! The fluorites are modified cubes with clear windows framed by frosty bevels; they measure to 3 cm.
Citrine is VERY rare from Russia. We buy all the good specimens we can find, which amounts to only a handful a year, even though we have early access to most of the sources. This one does not have the intense acid-yellow color that some Russian ones do, but a lighter amber hue. The large, intergrown crystals here are in fine condition and complete all around. You can see a patch of green inside from inclusions of chlorite. All Content and Design ©1996-2012 The ArkenstonePowered by http://mineralwebsites.comMineral Specimens by species; or by specimen id. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||