Cassiterite on Quartz
Elsmore Tin Mine, Elsmore, Gough Co.
New South Wales,
9.1 x 8.2 x 5.7 CM (cabinet)
new year 2021
An exceptional specimen of top quality gemmy Cassiterite crystals scattered on a wide Quartz crystal. A classic Australian locale where mining began in 1871, this piece is the best I have seen personally and is a fine Cassiterite from any place. The crystals all show twinning, some are contacted but not broken, and all are super lustrous. Crystals are up to 2.3 CM across. The Quartz crystal is broken and contacted on the backside, the front has some edge contacts and rough areas but nothing distracting from the bright Cassiterites. These look black without strong light, but when well lit, they are a golden brown color, translucent to transparent and contrast well with the Quartz matrix.
An nice older Chinese specimen of the dark transparent Cassiterites from Ximeng that are now very uncommon. These lustrous crystals on contrasting matrix show both twinned and untwinned forms. These are a dark brown to almost golden on some edges and are prettier in person. This find was unlike any other Cassiterites found in China, being more similar to the best from Bolivia, yet still recognizably different.
Exceptionally lustrous and choice specimen of Cassiterite crystals clustered with light blue Beryl (Aquamarine) and set off by well crystalized Muscovite. Ex Shields Flynn collection, this is an older Mt. Xuebaoding specimen that is unlike any of the later finds and is especially esthetic in person. In excellent condition as seen, the display face is in perfect condition the only damage is on the outside edges where this was removed. The bright glassy luster of the Cassiterites is hard to capture in photos it is really brilliant in person.
The very best Yaogangxian Cassiterite I have ever seen, with the largest crystals as well. An excellent multi-specie piece mostly composed of superb Cassiterite. This locale has produced thousands of excellent mineral specimens but Cassiterite is very rare from this famed locale. Sharp lustrous crystals to almost 3 CM are arranged in a radiating cluster on a very complex matrix. I count at least 7 mineral species on this miniature, but the Cassiterite is clearly dominant and is in fine condition as well. A superb modern classic and a very important Yaoganxian specimen.
Cassiterite on Quartz
Amo Mine, Ximeng
3.8 x3.4 x 2.2 CM (miniature)
Late Summer 2018
Cassiterites in gemmy crystals with brilliant luster and sharp form. The Amo mine in Ximeng county (Yunnan, China) produced a few spectacular Cassiterites. They were immediately prized and have almost disappeared. Unlike from any other location, these had a unique, recognizable style that could be very esthetic. This fine example is sharp, well formed, nicely perched on a cluster of quartz crystals that have some green inclusions as a bonus. In great condition there is contacting only on the back side not in view. In some photos what may look like damage is internal reflections inside the Cassiterites. Much better in person.
An old Saxony specimen with several lustrous Cassiterites to 2 CM mixed with a hundreds of small, gemmy Topaz crystals and Apatites as well. Ex Charles Noll Collection, with a very esthetic addition of what seems to be rich green Allophane encrusting both species. I have only seen one other similar old specimen (19th century vintage). Vintage label included. In very good condition, some minor chipping seen only with magnification. Crystallized on all sides.
Cassiterite variety Needle Tin
Minera Monserrat, Challapampa, Poopo Province
5.6 x 5.5 x 3.4 CM (cabinet)
A very unusual specimen from Boliva that looks like an old Cornish "needle tin". A three dimensional matrix densely covered with delicate accicular crystals of brown Cassiterite. In fine condition as seen, ex. Hitchings collection. Especially impressive under magnification, this is an uncommon habit and a well crystallized example.
Cassiterite on Muscovite
Mt. Xuebaoding, Pingwu Co., Mianyang Pref.
6.3 x 5.2 X 3.8 CM (cabinet)
Incredibly lustrous, super, sharp Cassiterite twin crystal set nicely on contrasting Muscovite matrix. The Cassiterite is 1.8 CM in diameter and has no damage or chipping even under 20X magnification. From finds in 2003 at Mt Xuebaoding, this quality of Cassiterite is simply not being found anymore. High esthetics and display impact for a small size specimen.