Rough opel 2$ per gram

Rough opal refers to the uncut, unpolished form of opal, a unique and mesmerizing gemstone known for its play of color. Here are some key points about rough opal:

1. Play of Color: Opal is famous for its play of color, which is a vibrant display of spectral colors that can change depending on the angle of observation and the light conditions.
2. Types of Opal: There are several types of opal, including precious opal (which displays the play of color), common opal (lacks the play of color), and fire opal (which is known for its fiery orange to red color).
3. Transparency: Rough opal can be opaque, translucent, or transparent, depending on the specific piece.
4. Formation: Opal is formed in voids or cavities within rocks, often through a process involving silica-rich water. The play of color is a result of light diffracting through tiny silica spheres in the opal.
5. Varieties: Common opal can come in various colors, while precious opal is typically associated with a play of color that can include hues such as red, orange, yellow, green, blue, and violet.
6. Hardness: Opal is relatively soft compared to other gemstones, with a hardness ranging from 5.5 to 6.5 on the Mohs scale.
7. Locations: Opal is found in various countries, with significant deposits in Australia, Ethiopia, Mexico, Brazil, and the United States.
8. Uses: Rough opal is often cut and polished to reveal its full play of color and is then used in jewelry, including rings, earrings, and pendants. It is also treasured by collectors for its unique optical properties.

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