20.15 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

Presenting a beautifully translucent grey moonstone from The Natural Gemstone Company, a single oval cabochon weighing 20.15 carats. This gem measures 18.35 x 13.70 x 10.59 mm, and its classic oval silhouette has been shaped to maximize play of light and surface appeal. The cabochon cut, rounded and smooth, showcases the specimen as a tactile and visual focal point, suitable for both modern and vintage inspired settings. The greys are calm and refined, offering a neutral palette that adapts easily to white gold, yellow gold, or sterling silver, and the overall size is generous enough to anchor a statement ring, an elegant pendant, or a striking brooch. As a moonstone, it carries the serene character that has drawn collectors and designers for centuries, and because The Natural Gemstone Company sources and presents this item in its natural, unenhanced state, you receive an authentic piece that speaks to nature and craftsmanship together.

Visually this grey moonstone displays a medium intense color intensity, creating depth without overpowering its subtle adularescence, the soft bluish to whitish sheen that moves across the surface as the stone is turned. The clarity has been graded as very very slightly included evaluated at eye level, meaning that when you examine the cabochon in normal viewing conditions, inclusions are minimal and do not detract from the gem’s overall visual impact. The excellent polish enhances both luster and adularescence, allowing light to glide across the dome smoothly and emphasizing the moon like glow that gives the gem its common name. Because the cut is cabochon, the surface geometry emphasizes internal light rather than facets, resulting in a calm, almost lunar glow that suits understated, elegant designs and statement pieces alike.

Beyond the immediate beauty, this moonstone is notable for being unenhanced, maintaining its natural integrity from the mine to your setting. The origin is Ceylon, Sri Lanka, a region renowned for producing gems with refined color and good optical characteristics, and our sourcing reflects longstanding relationships with trusted mines and cutters. The cutter has respected the stone’s internal structure and adularescence, yielding a dome height and curvature that balance sheen and durability. Moonstone has a hardness around 6 to 6.5 on the Mohs scale, so while it is durable enough for occasional wear in rings, we recommend protective settings such as bezels or lower profile mounts for everyday use. The dimensions make it versatile for a wide range of jewelry types, and its neutral grey allows designers to pair it with accent diamonds, sapphires, or complementary colored gems to craft pieces that range from minimalist to ornate.

At The Natural Gemstone Company we stand behind the quality and provenance of our gemstones, and this 20.15 carat grey moonstone is offered with full disclosure of its characteristics, including cut, weight, dimensions, clarity, color intensity, polish, enhancement status, and origin. If you are considering this gem for a custom commission, our team can assist with design suggestions that highlight the cabochon form and protect the stone for long term wear. For care, clean with a soft cloth and mild soap and water, avoid harsh chemicals, ultrasonic cleaners, and steam, and store separately to prevent abrasion from harder stones. We welcome inquiries about matching pieces, mounting options, and shipping and insurance arrangements. This moonstone is an exceptional natural treasure, ideal for collectors and designers who appreciate subtle beauty, ethical sourcing, and expert presentation, contact The Natural Gemstone Company to arrange viewing, request more images, or begin a custom design process.