Clam Shell Opal - 34.94ct - Hand Select Gem Rough rhodochrosite minerals

Clam Shell Opal - 34.94ct - Hand Select Gem Rough rhodochrosite mineralsA rare opalized fossil clamshell from Australia A rare opalized fossil clam from Australia that formed during the cretaceous period (about 100 million years ago.) Lost one of its shells and a bit banged up after its long life. There are some great spots of fire. Great collector's piece! Shown on 1 4" graph paper. Family : Opal Variety : Clam Shell Origin : Coober Pedy, South Australia Size : 29 x 23 x 10 Treatment : none known Total Carats : 34. 94

but what looks like a mud veil part way in at the inner curve

The clean ones are 6mm thick larger stone and 5mm thick smaller stone

Growing on the side is a blue sapphire that is just visiting

Total Carats : 342

Total Carats : 56

Gemmy but heavily included bi-color crystal

Great crystal shape on this little aqua

Size : 7 x 6 x 4

A neat set of sunset tourmaline that shows strong green to yellow and some orange dichroism

Size : 8 x 4 x 2

Size : 38 x 36 x 24

A striking blue green alexandrite that is moderately included