Opal — Gemstone Properties
Opal is one of nature's most spectacular gems — a stone whose play-of-colour (known as opalescence) shifts through every shade of the rainbow as the viewing angle changes. This phenomenon is caused by light diffraction through tiny silica spheres arranged in a grid-like pattern within the stone. No two opals are identical. Opal symbolises creativity, inspiration, and the full spectrum of human emotion.
Why does Opal change colour?
The play-of-colour in opal is caused by diffraction of light through silica spheres stacked in a precise pattern. As the angle of light or viewing changes, different wavelengths are diffracted, producing flashes of red, green, blue, and violet.
Is Opal fragile?
Opal rates 5.5–6.5 on the Mohs scale and has a relatively high water content (3–21%). It is more susceptible to cracking than most gemstones, especially if exposed to sudden temperature changes, very dry conditions, or physical impact. Handle with care.
What is a doublet or triplet opal?
Doublet opals have a thin layer of natural opal bonded to a dark backing material to enhance colour visibility. Triplets add a clear quartz cap on top for protection. Divine Quartz pieces specify whether the stone is solid natural, doublet, or triplet.
How should I store Opal jewellery?
Store opal jewellery in a slightly humid environment — a small damp cloth in a sealed pouch is ideal in very dry climates. Avoid airtight containers or prolonged exposure to heat and direct sunlight, which can cause dehydration and crazing.