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Octagon shape Monarch Opal Cabochon, 13x18mm, 10 carats, AAA grade front view
Octagon Monarch Opal Cabochon size comparison with quarter coin, 13x18mm, 10 cts
Octagon shape Monarch Opal Cabochon, 13x18mm, 10 carats, AAA grade front view
Video showcasing fire and color play in Octagon Shape Monarch Opal Cabochon
Octagon Monarch Opal Cabochon size comparison with quarter coin, 13x18mm, 10 cts

Monarch Opal Gemstone Cabochon, Loose Octagon Gemstone For Jewelry Pendant Making

  • $141.17
  • 1 available
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Stone Name Treated Monarch Opal Cabochon
Stone Color As Seen in Picture
Weight 10 Cts
Size Approx 13x18 mm
Quantity 1 Piece
Shape Octagon Shape
Treatment Lab Created
Back Side Flat
Quality AAA
Gemstone Type Treated
Country USA

The octagon cut trims away the soft curves of a typical oval, giving this stone crisp, defined edges — a good match if your design leans more geometric or modern than classic. At 10 carats and 13x18mm, it's substantial enough to anchor a pendant on its own.

  • Clean octagon lines for a modern, structured look
  • 13x18mm — sized well for pendants or larger ring bezels
  • Lab-created for even, dependable color throughout
  • Flat back, AAA graded

Monarch Opal Gemstone Cabochon, Loose Octagon Gemstone For Jewelry Pendant Making

$141.17

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