Gemmology
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Specimens of gemstones by colour: grey [gallery view] (Page 2)

Rainbow moonstone — specimen 0060
Chalcedony — specimen 0404
Chalcedony — specimen 0265
Chalcedony — specimen 0348
Chalcedony — specimen 0684
Chalcedony — specimen 0685
Chalcedony — specimen 0686
Chalcedony — specimen 0687
Chalcedony — specimen 0689
Chalcedony — specimen 0690
Chalcedony — specimen 0691
Chalcedony — specimen 0692
Chalcedony — specimen 0693
Chalcedony — specimen 0694
Chalcedony — specimen 0695
Chalcedony — specimen 0019
Chalcedony — specimen 0205
Chalcedony — specimen 0468
Opal — specimen 0273
Opal — specimen 0714

Specimens of gemstones by colour: grey — 59
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The specimens illustrated in this site do not exist in the collections of the National Museum of Natural History, Sofia.