Seam Agate Heart Cabochon 21x20mm 18.5ct – Natural Gemstone Pedra Gems

Express natural beauty and heartfelt elegance with our Natural Seam Agate Heart Shape Cabochon from Pedra Gems — a beautifully proportioned 21x20x5 mm gemstone weighing 18.5carats, cut into a deep, upright heart silhouette that radiates warmth, romance and natural character.

At 21x20mm this heart is 5mm taller than wide — a proportion that produces one of the most naturally satisfying and recognisable heart silhouettes in the Pedra Gems collection. The lobes are full and rounded at the top, flowing gracefully downward to a strong, decisive central point that gives the heart its most classic and timeless form.

✦ Stone Specifications:
• Shape: Heart
• Dimensions: 21x20x5 mm
• Weight: 18.5 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:
• Classic heart pendant & necklace designs
• Wire wrapping & heart bezel settings
• Statement heart ring centrepiece
• Valentine's Day & anniversary jewellery
• Crystal healing & heart chakra work
• Meaningful romantic gift for gemstone lovers
• Bridal & occasion jewellery making
• Everyday wearable heart pendant

✦ Why This Heart?
The 21x20mm proportions give this heart a naturally upright, deep character — the extra 2mm of height over width creates full, generous lobes at the top and a confident downward point that is deeply satisfying in both pendant and ring settings.

At 18.5 carats this stone sits in the ideal mid-size range — substantial enough to feel genuinely meaningful and premium as a gift or pendant centrepiece, yet light and compact enough for comfortable everyday wear. It is the sweet spot between the dainty small hearts and the bold large statement pieces in the Pedra Gems collection.

The 5mm dome adds excellent depth and warm light play across the polished natural agate surface — a classic dome height that gives this heart beautiful visual presence from every angle.

✦ Your Pedra Gems Heart Collection:
With over 10 heart listings, Pedra Gems offers one of the most comprehensive natural agate heart ranges available. This 21x20mm stone is a classic mid-size upright heart — larger and more substantial than our small hearts (21x20mm) yet more intimate and wearable than our large statement hearts (21x20)

✦ 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 from Pedra Gems share the same pattern, colour, or flow — every cabochon is a completely unique piece of natural art.

In crystal healing traditions, the heart shape combined with Agate's grounding energy makes this a powerful stone for heart chakra work — promoting love, compassion, emotional balance and inner strength.

Order today from Pedra Gems and receive a hand-selected natural gemstone — fully polished, flat-backed, and ready to become the heartfelt centrepiece of your next beautiful creation.