Smithsonite - Specimen abalone shell Approximate Size of 1 Piece:

Approximate Size of 1 Piece: 39mm x25mm x23mm

followed by a narrow band of blue-grey agate and the original dark basalt exterior

and marcasite

The crystal is fairly even in tone

Smithsonite - Specimen abalone shell Approximate Size of 1 Piece:Mined from: Yanga Koubenza Quarries, Mfouati District, Bouenza Department, Republic of the Congo Description: This one of a kind Smithsonite mineral specimen from Congo features bright turquoise blue Smithsonite covering a reddish brown matrix. The specimen has a mix of smooth botryoidal growth, rounded bubble like formations, and crusty druzy areas across the surface. The colour is strong and even in several sections, with lighter blue white patches