agate alloy aluminium amber ametrine amorphous solid ancient greece ancient greek ancient rome anglo-saxons aquamarine astrological sign aventurine birefringence brass brazil bronze carnelian chalcedony chemical formula chert chrysoprase citrine coesite copal copper corundum cristobalite cryptocrystalline crystal habit crystal structure crystal system crystal twinning diamond drunkenness egypt electrum emerald england fiorite flint fulgurite garnet gemological institute of america gemstone geode geyserite gold india intoxication iron jade jasper jewellery lake superior lake superior agate lamellar structure lapis lazuli lechatelierite list of minerals maine malachite manganese melting point minas gerais mineral moganite moss agate mozarkite nova scotia ontario onyx opal orbicular jasper ornamental stone oxygen palladium pearl peridot platinum pleochroism precious metal public domain quartz quartzite refractive index rhodium rose quartz ruby russia sapphire sard shocked quartz siberia silicon silicon dioxide silver smoky quartz sodalite solubility south korea specific gravity stainless steel sterling silver stishovite sulfur sunstone tanzanite texas thiocyanate topaz tridymite united states uruguay vitreous quartzite volcanic rock wikimedia commons yellow yellowstone national park zambia zodiac stones