Snowflake obsidian — specimen 0734, photo © NMNHS

Snowflake obsidian — specimen 0734

Origin

no locality data

Data

Weight: 1.91 ct; size: 9.97 | 6.11 | 3.47 mm; shape: rectangle; colour: black; clarity: opaque; cut: excellent; treatment: none.

Notes

Clean specimen; design ‘Rectangulum Cab’, excellent cut by Tan Pen.

Other specimens

More information from ‘Classification’

Snowflake obsidian

A variety of obsidian containing white ‘snowflake’ crystal patterns of the mineral cristobalite, originated due to partial crystallisation of the glass.