| 8naw921xxchalcan ((CHALCANTHITE)), $15 MINIMUM BID, Volyn Region, Ukraine Republic, 2.3 x 2 x 2 cm, Thumbnail | |
 | Here is a dark blue specimen of Ukraine Chalcanthite. Chalcanthite is copper sulphate and is water soluble. I have not seen these around previously and it is a fine thumbnail with stout crystals. |
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