7.48 x 6.69 x 4.13 inches (19.00 x 17.00 x 10.50 cm)
This huge gray seemingly volcanic origin rock has a massive open face overwhelmed with clear crystals of varying size of Calcite. Some of the modified "poker chip" crystals are quite sizable and rather thick. This giant association of tabular crystals which are gray via the matrix measures 9 inches (23 cm) long.
[Scale: 1 inch, with mark at 1 cm]
Estimate: $400 - up.
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