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10 things you need to know about "Synthetic Opal"


Bello Opal® rondelle (Polymer Impregnated Synthetic Opal) is highly interesting for customized jewelry design. And while rotating; there will be various of magical brilliance with attractive color changes. It is what we call “play of color”.

Other than the popular size of 14mm, you may order smaller sizes such as 6mm and 8mm for your jewelry design.

Different sizes of rondelles are available. Bello Opal rondelle with stripe pattern (B Cut)

Bello Opal rondelle in cylinder shape Bello Opal rondelle in cushion shape

Bello Opal rondelle with 925 silver logo core Bello Opal rondelle with 925 silver core

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Properties comparison to natural opal

Category Polymer Impregnated Synthetic Opal Natural Opal
80% Silica & 20% Resin Silica & Water
MOHS Hardness
4 3-5.5
Specific Gravity
1.80-1.90 1.98-2.20
Heat Resistance
130 degree C. 100 degree C.
Product Features
Color Range
OP01 to OP78
Degree of transparency
Relatively low
Jewelry Plating
Bello Opal® could work well with jewelry plating
Chemical Resistance
Thinner, Methanol, Acetone
Glass Compatibility
Bello Opal® is not glass compatible. Please refer to "Galaxy Opal"
Guarantee on quality
No Cracking, Crazing or Yellowing