Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Esquire #8 claim, Big Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- Miniature 4x2.5x2.5cm
- Special Info
- Type Locality
An excellent specimen, which may be the better of the Macdonaldite specimens on this update. This specimen has good coverage with areas of Macdonaldite 3mm across and showing a good pearly luster. It is associated with Pellyite, the brown vein and also Sanbornite.
- Availability
- Sold
- Locality
- Big Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- Thumbnail 3x1.5x1cm
- Special Info
- Type Locality
Slender, acicular colorless crystals to around 1mm. Very rare. Minor Gillespite (red) in matrix on backside.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Big Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- Miniature 4.5x4x2cm
- Special Info
- Type Locality
Excellent coverage of rare Macdonaldite in acicular radial sprays to 2mm over altered Sanbornite matrix. It is associated with tiny crystal grains of Fresnoite. Outside of the metasomatized barium deposits of California, there is only one other world locality for Macdonaldite.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Big Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- Thumbnail 3x1.5x1.5cm
- Special Info
- Type Locality
An excellent specimen with radial sprays of colorless to white acicular crystals to 1-2mm. The crystals are free-standing. Macdonaldite is an alteration product of Sanbornite but is rare. This is one of the better specimens in this Special Edition.
- Availability
- Sold
- Locality
- Esquire #1 claim, Rush Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- Thumbnail 3x2x2cm
- Special Info
- Type Locality
A superb specimen of glassy, white, acicular Macdonaldite in divergent sprays to 5mm.
- Availability
- Sold
- Locality
- Esquire #1 claim, Rush Creek, Fresno Co., California, United States
- Formula
- BaCa4Si16O36(OH)2·10H2O
- Size
- SmCabinet 6x3.5x3cm
- Special Info
- Type Locality
Radiating white crystals of Macdonaldite to 4mm acroos face. Excellent specimen.
