Crystal opals are opals that are semi-translucent.
Crystal Opals can be yellow, sunset orange, blue, purple and red all the colors of the rainbow.
Blue crystal opals are the most common crystal opals. Rarer is orange, with sunset red the rarest fire crystal colour. Most opal fields produce crystal opal, as it is formed with no base (like potch or ironstone or sandstone) it is appreciated for its rarity and unique colour patterns.
Crystal opal is perfectfor rings, earrings, pendants, brooches, and necklaces. The phrase “crystal opal” basically implies to any class of opal such as semi-black, white, and black opal, which has a translucent, lucid, or semi-translucent body. This is also known as the “diaphaneity” of a mineral.
The fineness of a crystal opal often provides a better lucidity and liveliness of colour compared with other solid stones. Pale and coloured crystal opals are normally more priceless compared with black and solid white opals, which can often have more attractive colours than solid black opals.
Crystal opals can be found in thesame places where white and black opals are found. White Cliffs in New South Wales is famous for yielding excellent quantities of crystal opal. Crystal opal is also popular as clear opal as it is translucent or lucid, as glass, but still shows vivacious series of colour with elaborated patterns.