This is a very cool piece. The iridescence takes place on the defined octahedral crystals, but on the base, where the contact was, it is the usual ...
South African minerals are always a wonderful part of a great collection. This specimen has very minimal damage and would provide a nice addition to ...
This member of the calcite family is believed to be the navigation stone used by the Vikings to find there way on the ocean when the sun was obscured ...
This is some of the most fluorescent hyalite opal that I have ever seen.
Calcite," which gets its name from ""chalix"" the Greek word for lime", is a most amazing and yet, most common mineral.
A. Lincoln Sherk MD. collection 1890s-1969
A very unique combination of hemimorphite, conichalcite, and smithsonite. Need a loop to see the smithsonite.
This is a nice specimen from the classic location at Mapimi, Mexico. The rosasite really adds nice color and contrast and displays well.
The hemimorphite from this location are well known for their delicate clear crystals that form beautiful sprays on the limonite matrix.
This is an another uncommon combination of hemimorphite in a red bed of carminite.
