Opal - Wikipedia
For gemstone use, most opal is cut and polished to form a cabochon. "Natural" opal refers to polished stones consisting wholly of precious opal. Opals too thin to produce a "natural" opal …
Opal Gems: Value, Price, and Jewelry Information - IGS
Opal gems are so unique you’ll need a special vocabulary to describe them. Learn all about the many opal varieties and how to evaluate them.
Opal Gemstone | Opal Stone – GIA
Opal is the product of seasonal rains that drenched dry ground in regions such as Australia’s semi-desert “Outback.” It is known for its unique display of flashing rainbow colors.
Opal Stone: Meanings, Properties and Uses - The Complete Guide
2019年4月11日 · Opal is a mineraloid or crystalline form of silica. It is colorless when pure. The Precious forms of Opal occur in a wide variety of colors, including white, yellow, red, orange, …
Opal Stone Meaning, Uses, Properties, Value, & More
2021年8月11日 · Opal gemstones are hydrated silica crystals that form over millions of years. Learn about opal details, including stone meanings and symbolism, history, pricing, and value.
14 Different Types Of Opal And What They All Look Like
2024年1月3日 · Opal is a fascinating mineral known for its unique play of colors and diversity. There are many types of opal, each with distinct characteristics that make them special. For …
Pictures of Opal - Black, Fire, Boulder, Blue and Pink
Opal is one of the world's most popular gemstones and the birthstone for the month of October. A nice precious opal can flash every color of the spectrum with an intensity and quality of color …
Opal (Common) Gem Guide and Properties Chart - Gemstones.com
This Opal (Common) gemstone guide lists qualities of the Opal (Common) gem type, including stone colors, common names, meanings, gemstone hardness and more.
Opal Gemstones: History, Symbolism, Meanings & More
2021年8月28日 · Opals are a hydrated silica gemstone seen in a stunning array of vibrant colors and patterns. Learn why no two opal gemstones are the same, and the meaning, history, and …
Opal Description - GIA
Opal is known for its unique display of flashing rainbow colors called play-of-color. There are two broad classes of opal: precious and common. Precious opal displays play-of-color, common …