OpalThis "Round Cabochon" cut gem has a beautiful colorless interior in transmitted light, but in reflected light it shows the highly desirable and seldom seen COLOR FLASH or "Contra Luz" effect with a beautiful rainbow like array of color! The color flash is best seen in sunlight or with a strong flashlight against a black background, and this stone was photographed under a strong light to better illustrate the effect. When strongly lit, this stone shows

A very nice

The piece was mined in 1978

I have to say that this is one of the few cat's eye Opals I've seen in a while

the piece displays beautifully

Phetteplace collection

Item # EUDIACAN013

) insect inclusions featuring mainly flies (Diptera) along with wasps (Hymenoptera)

Specimen# CO712B49

Specimen# CO712B168

This beautiful specimen has a striking color combination with gemmy colorless "Achroite" terminations

colorful minerals

It is important to note that Tourmaline is classified as a Type-3 gemstone