Gem Calcite Dichroscope

Easily distinguish garnet from ruby by determining if a stone is dichroic (reflects two colors).

Transparent calcite prism lets you view a gem’s pleochroic colors simultaneously in sharp contrast. You quickly separate the double refractive ruby from both garnet and red spinel which are singly refractive. resistant to temperature change, this durable, high quality dichroscope is a convenient time saver.