Chalcedony – Jasper

Appearance:

• semitransparent to opaque 
• virtually all colors

Variety and Trade Names:

• jasper – general variety term applied to semi translucent to opaque chalcedony of any color or combination of colors, except solid black or specially labeled material, such as bloodstone, onyx, etc.

Stone Information from:

Gem Reference Guide, by GIA, ISBN 0-87311-019-6
Gemstones of the world, Third Edition, by Walter Schumann, ISBN 1-4027-4016-6
https://www.gemdat.org/gem-2082.html
https://www.mindat.org/min-2082.html