Acanthite

#BN49862

Availability: Available
Price: $375.00
Reduced Price: $255.00

Locality: Valenciana mine, Guanajuato, Mexico
Formula: Ag₂S
Size: 10 x 3.5 x 3 cm - Cabinet
Tagged: sulfide, silver

Excellent steel grey cubic and modified cubic crystals of Acanthite to 9mm. There are several crystals. Great specimen!

Acanthite at Dakota Matrix Acanthite at WebMineral Acanthite at MinDat

Afwillite

#49651

Availability: Available
Price: $50.00

Locality: Crestmore, Riverside Co., California, United States
Formula: Ca₃(SiO₃)₂(OH)₂·2H₂O
Size: 5.5 x 3 x 2.5 cm - Sm Cabinet

Colorless to white short prismatic and striated crystals free standing on matrix. Excellent specimen for locality, which is now defunct.

Afwillite at WebMineral Afwillite at MinDat

Antigorite var. baltimorite

#PD49151

SOLD

Availability: Sold

Locality: near Wilmington, Delaware, United States
Formula: Mg₃Si₂O₅(OH)₄
Size: 6.5 x 4 x 2.5 cm - Sm Cabinet
Special Info: Antique Specimen

This is an old, antique specimen with a John H. Caswell label. The number on the specimen matches the label number. The name given to the mineral back then was "Baltimorite", which later was defined as Antigorite. The purple I assume is due to chromium tremolite. See prov. tab for label scan. As is typical of Caswell, the origin of the specimen was written on the back of his label. In this case it was A.C. Beatty.

Antigorite at Dakota Matrix Antigorite at WebMineral Antigorite at MinDat