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- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Esquire #1 claim, Rush Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- Thumbnail 2.4x2x2cm
- Tagged
- Ba Silicates , barium
- Special Info
- Type Locality
This is the best Macdonaldite in my stock. A rich specimen full of acicular radiating crystal groups to 2mm across. Macdonaldite is found in only one locality outside of California.
- Availability
- Sold
- Locality
- Esquire #1 claim, Rush Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- SmCabinet 6.5x3x3.5cm
- Tagged
- barium
- Special Info
- Type Locality
Superb white crystals in radial habit to 5mm across. Macdonaldite is found in only a handful of localities worldwide.
- Availability
- Sold
- Locality
- Manganese mine, Copper Harbor, Keweenaw Co., Michigan, United States
- Formula
- Ca2Mn3+3(SiO4)(Si2O7)(OH)3
- Size
- Miniature 4.5x3.5x3cm
- Special Info
- Type Locality
Deep rusty red radial groups of Macfallite to 7mm in black massive Braunite. This material carries a Paul Moore label from the Universitty of Chicago. Moore described Macfallite so I am assuming this stuff is type material or at least study material for the description. Macfallite is limited to only six occurences worldwide.
- Availability
- Sold
- Locality
- Manganese mine, Copper Harbor, Keweenaw Co., Michigan, United States
- Formula
- Ca2Mn3+3(SiO4)(Si2O7)(OH)3
- Size
- SmCabinet 6x4x3cm
- Special Info
- Type Locality
Deep rusty red radial groups of Macfallite to 7mm in black massive Braunite. This material carries a Paul Moore label from the Universitty of Chicago. Moore described Macfallite so I am assuming this stuff is type material. Macfallite is limited to only six occurences worldwide.
- Availability
- Sold
- Locality
- Manganese mine, Copper Harbor, Keweenaw Co., Michigan, United States
- Formula
- Ca2Mn3+3(SiO4)(Si2O7)(OH)3
- Size
- Miniature 4.5x3x1.5cm
Beautiful dark rusty red 3mm divergent sprays throughout matrix. There may be other rare manganese minerals on this specimen, but they are hard to tell apart. Excellent specimen.