Australian pink opal cabochon in a rectangular shape, 20×13×5 mm. Uniform opaque pink with a satin surface. Acquired at a wholesale lapidary market; unique piece.
Piece Details
| Mineral |
Australian Pink Opal (Common Opal) |
| Dimensions |
20×13×5 mm (±0.5 mm) |
| Shape and Back |
Rectangular, flat back |
| Finish |
Mirror polish |
| Hardness |
5.5-6 Mohs — we recommend a closed bezel setting |
| Origin |
Australia |
| Treatment |
Untreated |
| Piece Type |
Unique piece |
This specific piece
The rectangular 20×13 mm format is unusual for pink opal and facilitates straight bezel settings — both in bracelets and geometric pendant designs. The pink color is soft and uniform, without darker or bleached areas, with a satin finish that is typical of quality common opals.
What kind of setting it works for
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Straight bezel in 925 silver — The rectangular format fits perfectly in straight 925 silver bezels or "bezel setting" type frames with rounded corners.
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Geometric rings or pendants — The 20×13 mm size offers presence without being excessive; it works equally well as a statement ring or a minimalist rectangular pendant.
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Wire wrap — Compatible; the polished surface without sharp edges facilitates wrapping.
Australian pink opal in lapidary tradition
Australia produces over 90% of the world's opal. Australian pink opal, or "pink opal," is a common sedimentary variety, different from the valuable black opal from Lightning Ridge. Its pink pigmentation is due to palygorskite inclusions in the hydrated silica matrix.
In crystal tradition, pink opal is associated with tenderness and emotional openness — the artisan's stone, who works from affection for the material in their hands.
The symbolic properties attributed to minerals belong to cultural traditions. They are shared for educational purposes, not as medical advice.
How to recognize genuine pink opal
Genuine pink opal is opaque with slightly irregular pink under magnification — never perfect like an artificial dye. A resin imitation has very low weight and a perfectly homogeneous surface. Real opal shows microporosity visible with a 10× lens.
Frequently Asked Questions
Does this opal show play-of-color?
No. It is common opal — without play-of-color. Its value lies in the uniform pink color, not the iridescent sparkle of precious opal.
Is it suitable for everyday rings?
With a hardness of 5.5-6 Mohs, it is susceptible to scratches from everyday materials. Better for earrings or pendants; if used in a ring, a closed bezel and careful use are recommended.
Is it treated?
No detectable treatment. The color is natural. Statement based on lapidary observation; no formal gemological certification.
Are the dimensions exact?
The dimensions (20×13×5 mm) are actual measurements with a tolerance of ±0.5 mm due to being a handcrafted cut piece.
How is it cared for?
Avoid ultrasonic cleaners, abrasives, and sudden temperature changes. Clean with a soft, damp cloth. More in our care guide.
See also: cabochon collection.
