You may have heard of diamond qubits, but diamonds aren’t the only gemstones that can be used ... Spinels are a transparent gems that come in red, blue, black, lavender, white, yellow, and ...
Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co. Hardness and toughness Gem and mineral hardness is measured on the Mohs scale.