Thomsonite Balls Lot 511 - Specimens from India Brown 1 KG ASTREA CALCAR SHELLS

1 KG ASTREA CALCAR SHELLS 3/4 - 1 inch

decoration

BLACK MUREX SHELL 5 inch

Shells with Round Openings

5 inches - Cebu Beauty - Philippines

Thomsonite Balls Lot 511 - Specimens from India Brown 1 KG ASTREA CALCAR SHELLSTHE MINERAL THOMSONITE Thomsonite is an uncommon and desirable member of the zeolite group, forming in unique and interesting crystal aggregates. In 1997, the Zeolite Subcommittee of the IMA divided this mineral into two individual sub species, thereby regarding Thomsonite as a series of two members. The series is defined by calcium and strontium end members. Common Thomsonite, which is calcium dominating, is called Thomsonite Ca, and is usually pure