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]

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.

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.” The showers soaked deep into ancient underground rock, carrying dissolved silica …

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 …

Aug 11, 2021 · 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.

Aug 28, 2021 · 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 details that …

Explore comprehensive opal gemstone information covering varieties like black, fire, and boulder opals, their colors and patterns, historical significance, care tips, and symbolic meanings for enthusiasts …

October’s birthstone, opal is a gem of positive transformation, revealing the colorful attributes of those who wear it. Magical, mysterious, and lively—opal is captivating new admirers with its variety.