Mineral Specimen and Product Inventory Search
- Availability
- Available
- Price
- $75.00
- Featured
- Featured in Special Editions
- Locality
- 10th level, Potosi mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- Fe2+Sn4+(OH)6
- Size
- 4.5 x 1.5 x 3 cm - Miniature
- Tagged
- tin
Bright blue octahedral crystal to 1mm in black Ilvaite. Natanite is a rare tin mineral found at very few localities worldwide.
- Availability
- Sold
- Locality
- 10th level, Potosi mine, Santa Eulalia, Chihuahua, Mexico
- Formula
- Fe2+Sn4+(OH)6
- Size
- 3.5 x 3 x 2 cm - Miniature
- Tagged
- tin
Excellent micro Natanite crystal to 1mm in black Ilvaite crystals. Natanite is a rare tin bearing mineral. This is probably the premier site for this mineral in terms of color and size!
- Availability
- Sold
- Locality
- Horseshoe Dam, Maricopa Co., Arizona, United States
- Formula
- Na2(Si3Al2)O10ยท2H2O
- Size
- 8 x 7 x 3 cm - Sm Cabinet
This is a "top drawer" specimen with incredible sprays of white (near center) to colorless Natrolite crystals in sprays to 9mm across. The individual crystals have nearly flat terminations with two low angled faces. The cross-sections are square. There are also waterclear chabazite(?), which are thin and tabular. Some of the Natrolite crystals pierce the Chabazite. Incredible specimen. You will not be dissapointed with this zeolite specimen.
- Availability
- Sold
- Locality
- Fraser quarry, Haliburton Co., Ontario, Canada
- Formula
- KNa3(AlSiO4)4
- Size
- 7 x 5 x 5 cm - Sm Cabinet
Massive white to gray and blue Napheline with a good greasy luster.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Bear Meadow Adit, Quartz Hill deposit, Ketchikan district, Alaska, United States
- Formula
- NiAs
- Size
- 11.5 x 6 x 3 cm - Cabinet
- Tagged
- Ore Minerals
All of the Cobalt specimens in this update probably originated from a study conducted in the 1960's. The results were summarized in the landmark publication "The Silver - Arsenides Deposits of the Cobalt-Gowganda Region, Ontario" edited by L. G. Berry with major contributions by W. Petruk and J. L. Jambor. On page 108, Petruk describes the five assemblages of mineralization at Cobalt. This specimen clearly fits into group #1, the Nickel-Arsenide assemblage characterized by complex botryoidal masses of Nickeline inter-growths with Breithauptite, Safflorite and Cobaltite. The minerals form concentric layers and it would be impossible to differentiate visually all the minerals without a thorough microprobe study. Looking closely at the ore, one can see the plumose-texture characteristic of all of these ore specimens. It is sawed flat and polished on one side.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Cobalt-Gowganda dist., Ontario, Canada
- Formula
- NiAs
- Size
- 9 x 7 x 2 cm - Sm Cabinet
- Tagged
- Ore Minerals
Classic nickel arsenide assemblage as described by Petruk in "The Silver-Arsenide Deposits of Cobalt...", This specimen shows the plumose ore texture so typical of Cobalt but mostly composed of brassy colored Breithauptite and Nickeline with a distinct rose hue. This assemblage was found most prevalent in at the ends, tops and bottoms of most veins. Excellent specimen showing also the Dolomitic gangue. It is sawed flat on one side and shows natural breakage on the other.
