chalcedony
microcrystalline varieties of silica, may contain moganite as well
sardonyx
chalcedony variety
jasper
chalcedony variety colored by iron oxide
chrysoprase
apple-green, gem-quality, chalcedony variety
chrome chalcedony
Chromium containing variant of chalcedony
sard
chalcedony variety
Grape Agate
Calcite mineral
carnelian
yellow-red chalcedony variety, used as a semi-precious gemstone
fire agate
During volcanism hot water soaked with silica iron oxide fills cracks and bubbles in rock
onyx
banded variety of the mineral chalcedony
heliotrope
chalcedony variety