Opal is a hydrated amorphous form of silica (SiO 2 · n H 2 O); its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to the amorphous (chemical) physical structure, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals.

Sep 15, 2024 · Opal Stone Facts and Information. For thousands of years, people have mined and treasured opals. These striking stones are the traditional October birthstone and have inspired a rich body of folklore. (So rich, in fact, opal gems have been considered both the luckiest and unluckiest stones you can wear).

Apr 11, 2019 · Opal is a stone of balance and can help you regulate and balance your emotions and moods, especially if your mood changes are due to mental health or hormonal issues. It is also an excellent stone for promoting self-awareness and …

Mar 5, 2025 · 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 example, boulder opal, hyalite, and fire opal are all unique forms of this mineral.

Opal is an October birthstone. Grids of silica spheres 0.2 microns in size create red play-of-color flashes. Opal contains up to 20% water trapped in its silica structure. The novel “ Anne of Geierstein ” gave opal a reputation of being unlucky.

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 that surpasses the fire of diamond. The best opals command prices per carat that rival expensive diamonds, rubies, sapphires, and emeralds.

This Opal (Common) gemstone guide lists qualities of the Opal (Common) gem type, including stone colors, common names, meanings, gemstone hardness and more.

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.

Mar 22, 2023 · There are many different kinds of opal out there, far more than most people realize. Each has its own individual charm, whether it’s the colorful common opal found in the deserts of Nevada or the incredibly beautiful black opal that comes from the Lightning Ridge area in …

Opal is a gemstone composed primarily of silica and water, known for their striking iridescence and color play. These unique and captivating stones are formed when silica-rich water seeps into cracks and cavities in rocks, eventually solidifying and creating the mesmerizing patterns that characterize these alluring gems.