... , aventurine, rock crystal, blue quartz, citrine, hawk's eye, prasiolite, quartz cat's eye, smoky quartz, rose quartz and tiger's ... eye. The quartz is mostly transparent to translucent. Cryptocrystalline quartz, ... agate, chrysoprase, bloodstone, jasper and carnelian. Crytocrystalline quartz is usually opaque or translucent. Best quality of pure ...