QUARTZ VAR. CHALCEDONY AFTER ANHYDRITE.

These specimens have been little seen in the market. They show tabular anhydrite crystals that have been replaced by quartz, var. chalcedony, with a delicate bluish tone, lavender, very attractive tones. Moderately fluorescent under LW-UV light. Concentric growths of the chalcedony and the molds left by the anhydrite crystals can be observed. The main crystal is: 6,8 x 4,2 x 3 cm. 2,68 x 1,66 x 1,18 In.