Hong Kong International Jewellery Show 2025 | Venues:Asia World - Expo, Hong Kong (AWE) | Date:2nd – 6th Mar 2025

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SANWA PEARL & GEMS LIMITED
Products

Opal Raw / Rough Opal

Opal Raw or rough opal refers to opal stones that have not been cut, polished, or shaped for use in jewelry. Our lab-grown rough opals ensure quality and exhibit varied colors and patterns. Key features include:
  • Appearance: Rough opals often available in irregular shape and may have a dull exterior, with flashes of color visible through the surface. Sometimes for lab-grown rough opals, they may contain a layer of resin on the surface.
  • Types: There are various opals, such as raw black opal, raw white opal, raw boulder opal, and raw fire opal, each with unique characteristics.
  • Value: The value of rough opal is determined by factors like play of color, brightness, body color, density and hardness.
  • Use: Gem cutters assess uncut opals to determine how to cut them to maximize their beauty and value.
Rough opals are popular among collectors and jewelers for transformation into finished gemstones.
lab grown opal-raw opal-opal raw in irregular shape

Rough Opal in Irregular Shape

Our lab-grown opal rough stones are available in irregular shapes due to the production process and thorough quality checks. These uncut opals have an average thickness of 15 -18 mm and range in length from 30-100mm. You may find that the surface color is different than expected. But we guarantee the real quality after polishing meets the standard.

Different Type of Opal Cutting

opal cut-rough cut opal-opal cutting

Cut Opal Stones

Bello opal rough is easy to cut, making it a great choice. We provide high-quality cut stones in a wide range of colors. Ordering cut opal stones from us is a good option for your business.

opal cut-raw opal stone-dot pattern cut opal

1) A Cut (Dot Pattern)

A Cut pattern is the surface of the rough. The size can be bigger than 70mm. It is the most popular pattern in the market.

opal cut-raw opal stone-stripe pattern cut opal

2) B Cut (Stripe Pattern)

B Cut pattern is the side of the rough. It shows vertical fire which represents the growth pattern. It is an unique feature of authentic "Lab-Grown" synthetic opal.

opal cut-raw opal stone-crushed opal

3) Crushed Opal

The crushed opal is widely used for inlay design, such as ring, furniture etc.

opal inlay-opal inlay rings-opal inlay jewelry

Opal Inlay

Bello Opal is the mainstream of opal inlay. The intense fire makes the opals shinny even when the opals are thin and small.

Learn More About Raw Opal

Properties comparison to natural opal

Category Polymer Impregnated Synthetic Opal Natural Opal
Elements
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 OP96
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