Seam Agate Tumble Shape Cabochon 21x15mm 11.5ct Natural Stone

Embrace pure natural beauty with our Natural Seam Agate Tumble Shape Cabochon — a wonderfully organic 21x15x5mm gemstone weighing 11.5 carats, shaped into a smooth, softly rounded tumble form that echoes the natural character of a polished river stone.

Unlike geometric cuts such as oval, round, or pear, the tumble shape has no defined edges, precise angles, or symmetrical outline. Instead it flows freely — curves shifting gently into one another, creating an entirely natural, organic silhouette that is as individual as the banding pattern within the stone itself. It is nature at its most honest and beautiful.

✦ Stone Specifications:
• Shape: Tumble (Organic Rounded)
• Dimensions: 21 x 15 x 5 mm
• Weight: 11.5 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.
• Shape note: Tumble shapes are unique by nature — the organic silhouette of this stone is individual to this piece and will not be replicated in any other.

✦ Perfect For:
• Boho & nature-inspired pendant designs
• Wire wrapping — smooth curves wrap beautifully with no sharp edges
• Organic & freeform jewellery collections
• Electroforming & copper wrap projects
• Crystal healing & energy work — tactile, comfortable to hold
• Macramé & fibre art focal stones
• Meditation & pocket stone display
• Collectors of natural organic gemstone forms

✦ Why Tumble Shape?
The tumble shape is one of the most beloved forms among crystal healers, boho jewellery makers, and natural stone collectors. Its smooth, rounded, flowing silhouette feels instinctively natural in the hand — warm, comfortable, and deeply organic.

For wire wrappers, the tumble shape is a joy to work with. The absence of sharp corners or defined edges means wire flows smoothly and continuously around the perimeter without catching or requiring tight corner wraps. The result is naturally graceful, fluid wire work that complements the organic character of the stone perfectly.

At 21x15mm this tumble cabochon is a versatile mid-size — large enough to make a clear pendant centrepiece while compact enough for everyday wearable jewellery. The 5mm dome gives the stone excellent depth and a satisfying, rounded tactile quality.

At 11.5 carats this is a well-weighted stone with real substance — the weight and smooth form together create a grounded, satisfying quality that crystal healing practitioners particularly appreciate.

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

The tumble shape is the perfect vessel for Seam Agate's organic banding — both the shape and the pattern speak the same natural language, creating a stone that feels completely at home in the world and deeply connected to the earth.

Celebrated for its grounding and stabilising energy, Seam Agate is a favourite among crystal practitioners and artisan jewellers worldwide.

Order today and receive this exact hand-selected natural gemstone — smooth, polished, flat-backed, and ready to bring organic natural beauty to your next creation.