Opals are among the most captivating gemstones, displaying a mesmerizing play of colors. However, not all opals are the same, and understanding the differences between mined opals, doublets, and triplets is crucial when buying an opal. Each type has distinct characteristics that affect its value, durability, and maintenance. This guide will help you identify and differentiate them, ensuring you make an informed purchase.
1. What is a Solid Opal?
A solid opal is a natural gemstone cut and polished from a single piece of opal. It is the most valuable and durable type, with no artificial backing or layers. Solid opals come in various types, including black opal, white opal, crystal opal, and boulder opal earrings.
How to Identify a Solid Opal:
Uniform Structure: A solid opal consists of one continuous piece without any glued layers.
Side View Inspection: When viewed from the side, there are no distinct layers or separations.
Water Test: Solid opals are not affected by water exposure, whereas treated opals (like doublets and triplets) can be damaged if water seeps into the adhesive.
Price: They are typically more expensive than doublets and triplets due to their rarity and durability.
2. What is an Opal Doublet?
An opal doublet is a composite stone made from a thin slice of natural opal that is glued onto a black backing, often made of ironstone, plastic, or resin. The black backing enhances the vibrancy of the opal’s colors, making it look similar to a high-quality black opal at a fraction of the cost.
How to Identify an Opal Doublet:
Layered Structure: When viewed from the side, a distinct line separates the opal from the backing.
Uniform Black Base: Unlike natural black opals, which have natural variations, doublets have a uniform black backing.
Lighter Weight: Since part of the gemstone is artificial backing, doublets tend to be lighter than solid opals of the same size.
Vulnerability to Water: If submerged in water for extended periods, the glue holding the layers can weaken, causing the layers to separate.
3. What is an Opal Triplet?
An opal triplet is a step further from doublets in terms of construction. It consists of three layers: a thin slice of natural opal sandwiched between a black backing and a protective clear quartz or glass dome. The top layer enhances the stone’s durability and magnifies its play-of-color.
How to Identify an Opal Triplet:
Highly Glossy Surface: The clear dome gives the triplet a highly polished, often glass-like appearance.
Distinct Layering: When viewed from the side, three layers are clearly visible—black backing, a thin opal slice, and a transparent top layer.
Uniform Brilliance: The color play appears artificially enhanced due to the magnification effect of the clear top.
More Affordable: Triplets are less expensive than solid opals and doublets, making them a budget-friendly option.
Which Opal Should You Choose?
For Investment & Heirloom Quality: Choose a solid opal.
For a Balance of Affordability & Beauty: Consider an opal doublet.
For Budget-Friendly, Durable Jewelry: An opal triplet is a good choice.
Final Tips for Buying Opals:
Always ask the seller whether the opal is solid, a doublet, or a triplet.
Inspect the opal under different lighting conditions to see how its colors appear.
Avoid prolonged water exposure if purchasing doublets or triplets.
Buy from reputable jewelers to ensure authenticity.
By understanding the differences between solid opals, doublets, and triplets, you can make an informed choice that best suits your preferences, budget, and intended use. Whether you're investing in a rare Australian opal engagement ring or simply looking for a unique gemstone, knowing these distinctions will help you choose the perfect opal.
