• A polished oval cabochon opal with a marbled pattern of deep red, black, and iridescent blue-orange flashes, set in a black bezel against a textured beige background.
  • A polished oval cabochon opal with a deep reddish-brown body and iridescent play-of-colour, including blue and orange flashes, resting on a textured beige surface.
  • A polished oval cabochon opal with a deep reddish-brown body and vivid iridescent blue, purple, and gold inclusions, photographed on a textured beige surface.
  • A polished oval cabochon opal with a deep reddish-brown body and vivid iridescent blue, purple, and orange flashes, displayed on a textured beige surface.
  • An oval opal with a polished boulder opal pattern in deep red, brown, and black, embedded in a textured beige plaster ceiling.
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Georgie's Gem Studio

Large Boulder Opal Seam Cabochon

Large Boulder Opal Seam Cabochon

£69.00 GBP
£69.00 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.

Skycharge - A boulder opal where purple‑blue colour moves like quiet electricity in the sky, lit with soft yellow sparks across its tribal‑patterned surface.

This large solid boulder opal cabochon features sweeping seams of purple and blue across the full stone, accented by soft yellow pinfire.

The polished low‑dome oval shape shows colour on all sides, with a striking tribal‑style matrix pattern running through the opal.

The flat back makes it ideal for custom jewellery, bezel settings or wire‑wrapping, while the 38 × 16 × 4 mm size gives it real presence.

With brightness 4, the colour play is lively and noticeable, shifting beautifully as the stone moves.

A miner‑direct cabochon perfect for makers and collectors who love bold natural patterns.

  • Opal Type: Boulder Opal 
  • Format: Solid 
  • Colour: Purple, Blue, Yellow 
  • Pattern: Broad Flash + matrix tribal pattern 
  • Shape: Oval (low dome) 
  • Finish: Polished 
  • Brightness: B4 (of 5) 
  • Stone Dimensions: 38 × 16 × 4 mm 
  • Weight: 9 g 
  • Back: Flat‑back cabochon 
  • Source: Miner‑direct
  • Origin: Boulder opal fields, Queensland, Australia
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  • About Our Opals

    Every stone is natural, untreated, and individually cut.
    No two opals are ever the same - each piece is one‑of‑a‑kind. We source directly from a small Australian mining family, from ethical and regulated opal fields.

    All photos are taken with a macro lens, remember to check the opal dimensions before purchasing.

  • Why Buy From Us

    We only work with Australian opals. Every opal is sourced directly from a small‑scale Australian mining family who work with integrity, fairness, and respect for the land. Ethical sourcing and environmental responsibility matters to us.

    We want you to be delighted with every purchase, so please read our policies or contact us if you want to find out more:

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