Malachite pseudo after Azurite - USA classic
Sacramento Mine, Bisbee, Warren District, Mule Mtns, Cochise Co.
3.8 x 3 x 2.3 CM (small miniature/ large thumbnail (toenail))
Late Summer 2021
A textbook perfect pseudomorph that has the exact form of the original Azurite crystal fully altered to a velvety Malachite. A few tiny bits of Cuprite and Copper are seen with strong magnification on the gossan matrix, but overall this is all about the very fine Malachite. A classic US specimen from the Sacremento Mine at Bisbee, we are told this is from a pre 1929 collection but there are no old labels. Certainly no specimens of this quality have been found for many decades, and will not be seen again.
Two different forms of Fluorite on Calcite matrix sprinkled with Chalcopyrite crystals. The Fluorite cubes are very sharp, gemmy zoned and vividly fluorescent. The pink portions of the Calcite are also fluorescent making a nice contrast of purple, red and cream colors. The Fluorite cubes are up to 8mm in size and in perfect condition. The cores are a yellow hue with a blue outer zone. We almost never see this locality represented in Fluorite collections but it is clear it was capable of forming some very nice crystals.
A transparent and nearly pure crystallized Pollucite that has been heavily etched. Aside from some tiny inclusions this is all Pollucite with total transparency, and curved crystal faces. Pollucite is one of the few sources of Cesium and sometimes also includes substantial amounts of Rubidium, it is an uncommon gemstone as well. The specimen is broken on the base or underside where it was attached but the visible surfaces are in fine condition and show the characteristic Pollucite structure and luster perfectly. This is just under 36 grams of gem crystal that is very lustrous in person.
A nice combination specimen of dark green (nearly black from some angles) Quartz clustered on Andradite. The Garnets are tiny sparkling orange color and make a nice contrast. In very good condition as seen, the Quartz shows the classic form where it gets wider toward the termination, yet is not a scepter. Presents well from several angles with a good balance.
Gemmy and bright small Adularia crystals in two generations on a thin matrix plate. This specimen comes in an antique handmade display box of cardboard that has had a round hole cut into the top and a glass sheet installed. Old labels are included. The specimen is in excellent condition, the labels reference an early alpine locality now known as the Greiner area of Schwatz, Tyrol. All of the Adularia are transparent on close exam. Unfortunately it is impossible to know the exact vintage of this piece or the names of the early collectors but it is still a very nice antique presentation.
We do not often offer Indian Zeolite minerals as there are so many in the market and few stand out. However these can be both exceptionally esthetic and reasonable in price. This vivid orange spray of perfect Stilbites is that sort of specimen. The matrix is a jumble of Apophyllite crystals with off white porcelain luster that make a fine contrast to the orange. In perfect condition and with classic form, this is more impressive in person. Well selected Indian minerals are some of the greatest bargains in the mineral world, they offer perfection, color, esthetics and elegant forms at a low cost. This is that sort of specimen.
A hefty (7.6 gram), sharp and glassy Phenakite crystal from old finds in Minas Gerais (Brazil). It is hard to be certain but it certainly looks like this crystal is twinned; most are. The underside (or backside) has a large rehealed and recrystallized area that had been broken long ago. There is an unhealed break on one edge so this is not perfect 360 degrees but the display side looks flawless. The transparency and luster are great in person, this is a good sized and flashy crystal from a locality that has become a classic in Brazil but seems to be no longer producing.
A fine cluster of sharp Descloizite crystals in an esthetic cluster. This is an old specimen, the original yellowed label is for Oulifantsfontaine in South West Africa which is an old, little known locality for Descloizite located about 40 KM from the well-known Berg Aukus. This is the first specimen I have ever seen available from this locality and it is in excellent condition with a good luster. This piece is mounted on a wooden checker (game piece) with a black putty. It can be removed but this is a great old mounting job and a nice historic touch. The crystals look fine from every angle, and are in a nice arrangement much like a castle on a mountain.