OPAL

Opal is a gemstone renowned for its unique play-of-color, displaying a vibrant spectrum of colors caused by light diffraction through silica spheres. Unlike crystalline gemstones, opal is composed of amorphous silica.

Opals are primarily sourced from Australia and Ethiopia, each with distinct characteristics:

Australian Opals: Found in sedimentary rocks, these opals are known for their stability and vibrant play-of-color. They are durable and resistant to water, making them less prone to cracking or crazing.
Ethiopian Opals: Discovered in volcanic deposits, Ethiopian opals often exhibit hydrophane properties, meaning they can absorb water and change color or transparency. This makes them more susceptible to damage from water absorption and rapid temperature changes, requiring careful handling.

Group: Amorphous Silica
Refractive Index (R.I.): 1.37-1.52
Hardness: 5.5-6.5
Understanding the differences and care requirements between Australian and Ethiopian opals is crucial for maintaining their beauty and longevity.