The Ultimate Guide to Opal Jewellery

A Comprehensive Resource on Opals: Selection, Purchase, Types, and Maintenance

Opals stand among the world's most captivating gemstones, celebrated for their mesmerising display of colours and patterns. Unlike any other gem, opals exhibit an astonishing array of colours, qualities, and variations. To navigate the world of opals with confidence, explore the following information, which sheds light on these exquisite gemstones.

Unearthing the Origins of Opal

Opals predominantly originate from Australia, accounting for over 90% of the global opal supply. Various opal types have distinct origins across the Australian landscape:

• Black Opals: Primarily sourced from Lightning Ridge, New South Wales, Australia.
• Boulder Opals: Found mainly in Quilpie, Queensland, Australia.
• Crystal & White/Milk Opals: Gathered from Coober Pedy and Mintabie, South Australia.

Deciphering Opal's Nature

Opal consists of minute silica spheres arranged in an orderly pattern. The silica in opals is akin to quartz, yet it contains water within its mineral structure—typically about 6-10%. The remarkable spectrum of opal colours arises from the diffraction of white light by the silica spheres, breaking light into its constituent colours. A specific opal's colour range is determined by the diameter and spacing of its silica spheres. Moreover, opal colours can shift based on the angle of incident light, offering a captivating play of hues.

Diverse Opal Varieties

• Solid Black Opal: The most valuable and costly, featuring a dark background with vivid colors.
• Crystal Opal: Transparent or translucent with diffracted colours, sometimes paired with a black backing.
• Boulder Opal: A solid opal layer formed naturally on ironstone rock, offering brightness and allure.
• White/Milky Opal: Common and pale-hued, often displaying red, green, and blue shades.

Opal Construction and Variations

• Solid Opal: A single piece cut with a smooth, rounded surface, typically more valuable than others.
• Inlay Opal: Solid opal inserted into jewellery with a level metal surface.
• Doublet Opal: An opal that is too thin for solid cutting, typically layered with opal or ironstone on the back.
• Triplet Opal: Three-layered composition of precious opal, quartz, and ironstone/common opal.

Buying Opal Jewellery: Factors to Consider

When purchasing opal or opal jewellery, several factors influence your choice:

• Type & Background Colour: Different opal types hold varying values, with black opal being the most prized.
• Size: Larger opals generally command a higher value.
• Brilliance: Vibrant colours enhance value, with single-colour vibrancy prized.
• Colour: Multiple colours enhance value, with red, orange, yellow, green, blue, indigo, and violet in order.
• Pattern: Distinctive patterns and brilliance boost value and allure.

Caring for Opals: Delicate Elegance

Opals are more fragile than diamonds and sapphires, demanding gentle treatment. It's advisable to remove opal jewellery during activities such as sports, gardening, and household chores to prevent damage. Avoid knocking or scraping opals, as they are fragile and susceptible to damage. While opal rings can be worn occasionally, they are best suited for special occasions rather than daily wear.

Cleaning Opal Jewellery: A Gentle Approach

To clean opal surfaces, use a soft facial tissue or silk to rub the gemstone gently. Avoid chemicals, abrasives, toothpaste, or ultrasonic cleaners. A mild, soapy, lukewarm water solution and a soft toothbrush can be used for solid opal jewellery. However, refrain from immersing doublet or triplet opals in water, as the adhesive can deteriorate over time. Sudden temperature changes should also be avoided to prevent damage.

Discover the allure of opals—gems that weave a tapestry of colors, patterns, and mysteries. With this comprehensive guide in hand, you can confidently explore, purchase, and care for opal jewellery that reflects your unique style and personality.