For use in jewellery, most opal is cut and polished to form a cabochon, a convex shape that maximises the viewing angles through which an opal's play of colour can be observed. "Natural" opal refers to …

Opal [Experiment]

OPAL Ohio Permit and Liquor Licensing OPAL (Ohio Permit and Liquor Licensing) is an account-based system that enables applicants and permit holders to apply for, transfer, and renew their liquor …

Jun 23, 2011 · Opal Collection is a premier assortment of luxury hotels and resorts, located in the most treasured destinations on the East Coast.

Opal makes it easy to create multi-step flows that chain prompts, model calls, and tools together. Simply type what you want to make with natural language and Opal builds a workflow you can...

Mar 5, 2025 · Explore the vibrant world of gemstones! Learn about the different types of opal and where to find them in our comprehensive guide.

Jan 24, 2026 · Opal, silica mineral extensively used as a gemstone, a submicrocrystalline variety of cristobalite. In ancient times opal was included among the noble gems and was ranked second only …

Photos of opal from around the world. Guidance for people who want to buy opal, see different types of opal, understand their names, learn about synthetics and imitations.

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.

An opal might show a single color, two or three colors, or all the colors of the rainbow! The best play-of-color is the brightest; if it also has all the rainbow colors, then it is very rare and valuable.