Answer: onyx

AnswerCrossword Clue
ONYXVariety of agate
ONYXOrnamental chalcedony
ONYXType of quartz
ONYXBlack quartz
ONYXBanded quartz
ONYXShade of black
ONYXAncient birthstone for July
ONYXBlack gemstone
ONYXBanded gemstone
ONYXCameo gem
ONYXMulticoloured agate
ONYXMulticolored stone
ONYXFigurine mineral
ONYXMulticolored agate
ONYXFigurine agate
ONYXMineral that's often black
ONYXBanded gem
ONYXBanded quartz stone
ONYXBanded cameo material
ONYXGem with colored bands
onyxa variety of quartz
ONYXStone used for cameos
ONYXChalcedony
ONYXIntaglio stone
ONYXCameo appearance?
ONYXStone meaning "fingernail" in Greek
ONYXAgate variety
ONYXCameo gemstone
ONYXCameo mineral
ONYXBlack stone
ONYXJet black
ONYXCameo stone
ONYXQuartz variety
ONYXBanded chalcedony
ONYXJet-black
ONYXJet-black stone
ONYXJet-black gem
ONYXCameo material
ONYXStone seen in Mammoth Cave National Park
ONYXSemiprecious stone