Thomsonite Balls Lot 501 - Specimens from India Sand LEFT HAND WHELK 10 +

LEFT HAND WHELK 10 +

average size=eigth of one inch

making it an eye-catching centerpiece for reef tanks

BLACK & WHITE KNOBBLEY SHELL Vasum Cornlgerum - Vasum Turbinellum

Thomsonite Balls Lot 501 - Specimens from India Sand LEFT HAND WHELK 10 +THE 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