Mineral Species: Datolite

Chemical Formula: CaBSiO4(OH)

Chemical Name: Calcium Boron Silicate

Mineral Class: Nesosilicate

Mineral Notes: Datolite is a rare mineral ocurring in cavities in basaltic lavas, often in association with Zeolites. It may be confused with minerals like Prehnite, but the characteristic porcelain-like appearance is unmistakable and readily helps identification. It also gives a green flame test indicating the presence of Boron.

Description: Large, pale-green Datolite crystals on matrix. Excellent surface luster with well developed crystals. Many of these are transparent making the Datolite very gemmy.

Location: West Patterson, New Jersey, USA.