Thomsonite Balls Lot 511 - Specimens from India Brown and is usually pure without

and is usually pure without any strontium

Shells with Round Openings

1 KG ASTREA CALCAR SHELLS 3/4 - 1 inch

Opalite can also be found under the names argenon

BLACK MUREX SHELL 5 inch

Thomsonite Balls Lot 511 - Specimens from India Brown and is usually pure withoutTHE 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