Carnelian for sale at wholesale prices. Carnelian is a glassy, translucent gemstone that is typically light brownish-red to deep transparent stone. Carnelian belongs to the quartz family of gems and has been called Red agate or Red chalcedony in modern times. Most cabochon Carnelian are opaque with a domed top and flat bottom. Our rough section has some large pieces which are perfect for cutting into a Cabochon. Since it comes from the Quartz family, it is a hard and durable stone suitable for daily use as jewellery.