Covellite - bright iridescent crystals
Reynolds Mine/ Summitville Mine, Summitville District, Rio Grande County
6.4 x 4.1 x 2.9 CM (cabinet)
Bright metallic crystals and plates of Covellite with top luster and flash. An American classic locality, these look very much like the older Sardinian crystals. Covellite is not a very rare sulphide, but any crystals are quite rare and larger ones like this are incredibly so. The bright blue, gold and purple hues are very hard to capture in a photograph, in person though they are really striking. We have had a few very nice Summitville Covellites over the past few years but this one has the brightest luster, richest color and best definition. A killer for the locality.
Stellerite and Quartz
Tambar Springs, Pottinger County
New South Wales,
11.3 x 9.2 x 3.7 CM (cabinet)
Large crystals of this rare Zeolite (Stellerite) with intense salmon orange color are sprinkled with sparkling colorless Quartz balls. From the famed discoveries at the Tambar Springs area of the Garawalla Volcanics. The Stellerite from this zone is unlike any other known worldwide, which is usually in very small crystals or rounded balls. In excellent condition the crystals on this piece exceed 5 CM and have sharp form, bright luster and are translucent to transparent. This deep orange color is the most sought after for Stellerite, these are now only seen from older collections. A first rate rare Zeolite with fine esthetics, minimal matrix and display pop.
A sharp and well-zoned gem Tourmaline crystal shows up to 6 separate color areas. The crystal is perfectly terminated and 4.1 CM tall, perched on the side of a single Quartz prism. The top section of the Elbaite is nearly colorless but in some light sources has a very pale purple-blue hue. The bottom section of the crystal is contacted, incomplete and rough but with a partial, crude termination. Well-striated and lustrous in person. From finds about 9 years ago at Stak Nala (Pakistan); this pocket had some usually vivid color with much less dark zone. There is a crack in the back of the Quartz crystal that looks like it has been repaired, this does not affect the Elbaite but it does make the price much lower than otherwise. Since the crack is not seen on normal display at all this gives an excellent value for a nice, sizable gem crystal on a fine matrix.
Brilliant, lustrous Emerald-green mass of well-formed crystals on minimal matrix. From the world class find about 8 years ago at Milpillas, these were huge news in the mineral world at that time. They have since become very scarce on the market in such quality. The crystals reach over 1.2 CM long and are fairly stout so the specimen is not as fragile as many were. The style and esthetic feel of these Brochantites are unlike any others worldwide, this is a very choice example.
Sphalerite with Quartz
Krushev Dol Mine, Madan, Rhodope Mts.
10.4 x 7.5 CM (cabinet)
As a rule, black Sphalerite is not a very attractive mineral, but this one is something special! Lustrous and sharp glassy Sphalerites to almost 3 CM are decorated with treelike growths of slender Quartz crystals. In great condition and with killer esthetics, the Sphalerites are well-positioned and show complex growth hillocks on many faces. Careful examination finds only minor edge wear on some Sphalerites, nothing distracting from the impact of this piece. Great for this specie and exceptional for this famous mineral region!
Berzelianite - rich, rare Selenide
Bukov Mine, Rozna, Zdar nad Sazavou District
7.8 x 7 x 3.1 CM (cabinet)
A fine and rich specimen of the rare Copper Selenide Berzelianite. While far from pretty (for many people an ugly specie) this is very large and fine for the specie and shows well the Berzelianite and its alterations to other Copper Selenides. The brown sooty material and the dark metallic versions of the specie are both well-exposed. It seems some associated Tiemannite is present also. There are not very many Selenides in the mineral world, and the deposit at the long closed Bukov Mine (Czech Republic) was perhaps the best known classic source of Copper Selenides. The mineral has a long and rich history being named by James Dana (father of modern mineralogy) for Jakob Berzelius who was the creator of the periodic table, symbols of the Elements and chemical notation, and often called the father of analytic Chemistry. Described in 1850 shortly after the death of Berzelius, in honor of his discovery of the element Selenium and at least 5 other elements. This specimen was collected in 1970 when this could still be found at the site.
Elbaite - Jonas Mine, classic locale
Jonas Mine, Itatiaia District, Conselheiro, Doce Valley
6.6 x 1.2 x 1.1 CM (cabinet)
From the famed find at the Jonas Mine decades ago, this Tourmaline shows the classic cranberry red color with the slight hint of purple that makes these crystals so distinctive. In excellent condition the main crystal has several stepped terminations and a smaller parallel crystal has simple prismatic termination. No damage except on the base where it was attached, this is of course invisible when the crystal is standing. Looks fine on all sides and the color and luster are first rate.
A matrix plate hosting several sharp, gem clear Apatite crystals from the small find in late 2021 at Huanzala (Peru). In excellent condition, the Apatites are undamaged, a rich lemon-yellow color and brightly lustrous. This was a small find from a famed locality but not well-known for Apatites of such quality. This specimen was selected as one of the few with good condition and well-exposed Apatite from about 40 pieces in this find.