material sterling silver (or mixmetal) gold

gemstone abalone agate aquamarine aquaprase amazonite amethyst ammolite apatite brookite chalcedony chrysocolla chrysoprase citrine danburite diamond diopside (star) dumortierite gem silica garnet grandidierite iolite jade jasper carnelian cobalto-calcite coral crystal quartz kaynite labradorite lapis lazuli larimar lodolite quartz maw sit sit moonstone morganite Nephrite jade no gemstone obsidian peridot onyx opal pearls (natural) pietersite prasiolite (green amethyst) prehnite pyrite rhodochrosite rhodonite ruby rose quartz sapphire sagenite (gold rutile quartz) serpentine scapolite sunstone emerald spinel super 7 (melody stone) tanzanite titanine/sphene topaz tourmaline tourmalinated quartz turqoise moldavite smoky quartz