This sacral chakra singing bowl is made from highest quality quartz and tuned D note perfect pitch on 440 hz. TOPFUND crystal singing bowls have a translucent white, the crystal singing bowl set comes with a heavy duty crystal singing bowl case. The crystal singing bowl is housed in a suede texture crystal singing bowl bag to prevent pollution and easy to access. A TOPFUND crystal singing bowl suede striker & O-ring are packed in bundle pocket.