Crystal opal and white opal are two of the most commonly compared opal types — and they are often confused. Both can show beautiful play‑of‑colour, both are found in Australia, and both are popular in jewellery. But they differ in transparency, body tone, brightness, rarity, and value. If you want to compare them to other opal types, you may also like Black Opal vs White Opal.
This guide explains how to tell them apart, how body tone and transparency affect value, and which type is best for collectors or jewellery buyers.
What Is Crystal Opal?
Crystal opal is defined by its transparency. Light passes through the stone, giving it a glowing, glass-like appearance. This transparency makes the play‑of‑colour appear sharper and more vivid. For a deeper comparison, see Black Opal vs Crystal Opal.
- Transparency: Transparent or translucent
- Body tone: Can range from N1 (black) to N9 (white)
- Brightness: Often very high due to light penetration — explained in What Is Opal Brightness?
- Rarity: Less common than white opal
- Value: High for bright stones
Because of its clarity, crystal opal can show colour in a way that looks three‑dimensional — almost like the colour is floating inside the stone.
What Is White Opal?
White opal has an opaque, pale body tone. It does not allow light to pass through, giving it a soft, pastel appearance. For a full comparison with darker opal types, see Black Opal vs White Opal.
- Transparency: Opaque
- Body tone: N7–N9 (light)
- Brightness: Softer, more pastel
- Rarity: More common
- Value: Generally lower than crystal opal
White opal is especially associated with Coober Pedy and is one of the most recognisable opal types worldwide. Learn more about opal origins in How Opal Fossils Form.
Crystal Opal vs White Opal: Key Differences
| Feature | Crystal Opal | White Opal |
|---|---|---|
| Transparency | Transparent / Translucent | Opaque |
| Body Tone | Any (N1–N9) | Light (N7–N9) |
| Colour Intensity | Strong, vivid | Soft, pastel |
| Rarity | Less common | More common |
| Typical Value | Medium–High | Low–Medium |
How Transparency Affects Value
Transparency is the defining feature of crystal opal. When light enters the stone, it interacts with the silica structure more efficiently, producing:
- Higher brightness (see Opal Brightness Guide)
- Sharper colour edges
- More depth and dimensionality
This is why bright crystal opals can be worth more than many white opals — even if they share similar colours.
How to Tell Crystal Opal From White Opal
You can identify the type by checking how much light passes through the stone.
- Crystal opal: Hold it to a light — you’ll see glow or transparency.
- White opal: Completely opaque, no light passes through.
If the stone looks like it has a glowing inner light, it is almost certainly a crystal opal. For more identification tips, see Black vs Crystal Opal.
Which Opal Should You Choose?
Both types are beautiful, but they suit different buyers:
- Crystal opal: Best for collectors and buyers wanting vivid colour and rarity.
- White opal: Ideal for jewellery lovers who prefer a soft, classic look.
If you’re choosing an opal for a ring, you may find this helpful: Opal Engagement Rings Guide.
Search trends show strong interest in white opal value, crystal opal price, and white opals for sale — meaning both types are actively sought after in the UK and internationally.
Where to Buy Natural Australian Opal
WM Opals mines and cuts opal directly in Lightning Ridge, offering ethically sourced stones with full transparency. Every opal is photographed in natural light and graded by hand — including our full range of crystal opals and white opals.