Seam Agate Trapezoid Cabochon 21x13mm 10.5ct – Natural Gemstone

Bring bold geometric character to your jewellery designs with our Natural Seam Agate Trapezoid Cabochon — a striking 21x13x4mm gemstone weighing 10.5 carats, cut into the distinctive trapezoid silhouette loved by contemporary and art deco jewellery makers.

The trapezoid shape — also known as the trapeze cut — features four sides with two parallel edges of different lengths, creating an asymmetric angular form that is both architectural and dynamic. When paired with the organic flowing bands of natural Seam Agate, the result is a stone that beautifully bridges natural and geometric worlds.

✦ Stone Specifications:
• Shape: Trapezoid (Trapeze Cut)
• Dimensions: 21 x 13 x 4 mm
• Weight: 10.5 Carats
• Stone Type: Natural Seam Agate
• Cut: Cabochon (flat back, domed top)
• Finish: High-polish, smooth surface
• Please note: As these are natural gemstones, size and weight may vary slightly. Dimensions may differ by ±0.5mm and weight by ±0.5ct from the listed measurements.

✦ Perfect For:
• Modern & contemporary pendant designs
• Art deco & geometric jewellery styles
• Wire wrapping & angular bezel settings
• Statement ring centrepiece
• Minimalist & architectural jewellery
• Crystal healing & grounding work
• Collectors of unusual gemstone cuts

✦ Why Trapezoid Shape?
The trapezoid is one of the most sought-after geometric cuts among modern jewellery designers. Its angular lines create visual interest and a sense of intentional design that round and oval stones simply cannot offer. The wider top edge draws the eye while the narrower base creates natural downward movement — ideal for pendant settings.

At 21x13mm, this stone is a confident, mid-size piece — large enough to make a clear visual statement without overpowering a design. The 4mm dome keeps the profile sleek and contemporary, making it equally suited for ring and pendant settings.

✦ About Seam Agate:
Seam Agate is a natural chalcedony formed within rock seams and fissures, producing richly layered banding in warm, earthy tones. No two stones share the same pattern, colour, or character — every cabochon is a completely unique piece of natural art.

Celebrated for its grounding and stabilising energy, Seam Agate is a favourite among crystal practitioners and artisan jewellers worldwide. Its earthy tones complement both silver and gold settings beautifully.

Order today and receive a hand-selected natural gemstone — polished, flat-backed, and ready to anchor your next geometric jewellery creation.