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Mixed Minerals December 12, 2025 · 13 specimens |
R637 - Rhodochrosite sold
Santa Eulalia, Chihuahua, Mexico
Cabinet - 13.5 x 9 x 3.5 cm
Gemmy red Rhodochrosite crystals on matrix from old finds in Mexico. Good coverage of crystals, especially for Santa Eulalia, with crystals to 1.3cm in length. The matrix is coated by a black, satiny botryoidal mineral.
R638 - Benitoite, Neptunite sold
Gem Mine, San Benito Co., California, USA
Cabinet - 11 x 6 x 2 cm
Schist matrix covered by numerous highly lustrous black Neptunite crystals with 5 deep blue Benitoite crystals. The Benitoite reach 1cm in size and have good transparency.
R640 - Benitoite sold
Gem Mine, San Benito Co., California, USA
Miniature - 4.8 x 3.5 x 1.5 cm
Benitoite crystals with white Natrolite on a schist matrix. The Benitoite reach 1.2cm in size and have bright glassy luster on some faces. The second largest crystal is triply terminated.
R641 - Benitoite sold
Gem Mine, San Benito Co., California, USA
Thumbnail - 1.4 x 1.2 x 0.8 cm
Two intergrown dark blue Benitoite crystals. The crystals have Crossite inclusions and are sharp, translucent with moderate luster.
R642 - Benitoite, Neptunite sold
Gem Mine, San Benito Co., California, USA
Small Cabinet - 8.5 x 7.5 x 3.5 cm
Schist matrix covered by numerous highly lustrous black Neptunite crystals, most of which stick straight up out of the matrix. There is also a single 7mm Benitoite crystal.
R643 - Smithsonite, Willemite, Mimetite $240 available
Berg Aukas Mine, Otavi Mtns., Namibia
Small Cabinet - 5.5 x 4 x 2.5 cm
R644 - Anglesite $450 available
Touissite, Morocco
Miniature - 3.5 x 1.8 x 1.5 cm
R645 - Hausmannite $650 available
N'Chwanning Mine, Kuruman, South Africa
Small Cabinet - 6 x 5 x 5 cm
R646 - Kermesite with Valentinite, Paakkonenite sold
Kermesite occurrence, Dafeng, Shanglin County, Nanning, Guangxi, China
Small Cabinet - 6.3 x 2.5 x 2.5 cm
Beautiful deep red spray of Kermesite crystals on matrix. These were found in the early 2000s from an unnamed antimony mine in the Damingshan range near the town of Dafeng. This find was one of the most significant ever for Kermesite and most found were loose crystals or small sprays of crystals and not on matrix. The Kermesite crystals here sit aesthetically on matrix. The matrix is covered by the rare mineral Paakkonenite and small yellow crystals of Valentinite.
R647 - Vesuvianite sold
Stifle Memorial Claim, Georgetown, El Dorado Co., California, USA
Thumbnail - 2.5 x 2 x 2 cm
Gemmy Vesuvianite crystals on matrix, excellent for a California Vesuvianite which are typcally brown. Transparent yellow crystals with hints of purple.
R648 - Grossular sold
Stifle Memorial Claim, Georgetown, El Dorado Co., California, USA
Thumbnail - 3.0 x 2.2 x 2 cm
Rare colorless Grossular crystals from a small find made in 2018 near Georgetown. The specimens were found in an approximately 3 meter long lens in Serpentine that was completely mined out. These have been analyzed as nearly pure end member Grossular with the crystals occurring in bunches or on massive white Grossular. This specimen features a particularly good 6mm crystal on matrix with other smaller crystals. This deposit is featured in the November-December 2019 Mineralogical Record magazine.
R650 - Grossular $125 available
Stifle Memorial Claim, Georgetown, El Dorado Co., California, USA
Thumbnail - 2.5 x 2.5 x 1.5 cm
R651 - Gitter Quartz sold
Erongo Region, Namibia
Miniature - 4.5 x 2 x 2 cm
Cris-crossing Quartz crystals known as 'Gitter Quartz' (a German name for fence or lattice Quartz). The Quartz crystals form epitaxially on an elongated single Feldspar crystal in a lattice of crystals. The Feldspar crystal on this specimen appears to have completely pseudomorphed to Quartz. The Erongo Mountains is the one of the only localities that produces this style of unusual Quartz specimens.