Seam Agate Round Cabochon 25x4mm 25ct – Natural Gemstone

Experience timeless natural beauty with our Natural Seam Agate Round Cabochon — a perfectly circular 4mm gemstone weighing 25 carats, offering the most universally versatile shape in jewellery making combined with the rich, earthy character of genuine Seam Agate.

At exactly 25mm, this is a true round cabochon — equal in width and height — making it a perfect fit for standard 25mm round bezel settings, ring mounts, and pendant blanks straight from the box. No custom fitting, no guesswork — just a beautifully natural stone ready to set.

✦ Stone Specifications:
• Shape: Round (Circle)
• Dimensions: 25x4 mm (20mm diameter)
• Weight: 25 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:
• Round bezel pendant & necklace settings
• 25mm ring bezel settings
• Wire wrapping & round frame settings
• Stud & statement earring designs
• Brooch & pin centrepiece
• Crystal healing & all-purpose energy work
• Beginners & experienced jewellery makers alike

✦ Why Round Shape?
The round cabochon is the most classic and widely used shape in gemstone jewellery — and for good reason. Its perfect symmetry means it works in any orientation, fits the widest range of standard settings available, and suits every jewellery style from minimalist to bohemian to fine jewellery.

At 20mm diameter, this stone is a confident, substantial size — large enough to command attention as a pendant centrepiece or statement ring stone, yet proportionate enough for everyday wear. The 5mm dome gives it excellent visual depth and a satisfying, tactile quality.

At 18.5 carats, this round cabochon carries impressive weight for its size — a testament to the density and quality of the natural Seam Agate material.

✦ Beginner Friendly:
Round cabochons are the easiest shape to work with for new jewellery makers — standard round bezels are the most widely available and affordable setting type, making this stone an excellent choice for those just starting out in wire wrapping or bezel setting.

✦ 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 flow — 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 warm tones complement silver, gold, and copper settings equally well.

Order today and receive a hand-selected natural gemstone — perfectly round, fully polished, flat-backed, and ready to set into your next creation.