SI means the gemstone contains inclusions that may be visible under magnification and, in some cases, to the naked eye, while still maintaining attractive overall appearance and brilliance.
Certified Natural Cobalt Blue Spinel from Sri Lanka with a beautiful cushion cut, vivid blue color, and sparkling luster. This exceptional 6.12 Ct loose gemstone is suitable for rings, pendants, custom jewelry, investment collections, and high-end gemstone collections.
This gemstone has SI clarity and is completely natural and untreated.
With a hardness of 8.0, Spinel is a durable gemstone suitable for everyday jewelry wear when properly cared for.
Its cushion cut combines outstanding brilliance with elegant proportions, beautifully showcasing the gemstone's rich cobalt blue color. The impressive 6.12 carat size, Sri Lankan origin, and certified status make this gemstone an exceptional collector-grade specimen.
Cobalt Spinel is among the most sought-after and valuable varieties of spinel due to its intense electric blue coloration. Large natural cobalt spinels are exceptionally rare, making this gemstone a remarkable choice for collectors, investors, and fine jewelry enthusiasts seeking a truly distinctive gemstone.
This gemstone comes with a CGJ Sri Lanka certificate, providing additional confidence in its authenticity and natural characteristics.
Established in 2014, NishGems is a Sri Lankan exporter of natural coloured gemstones with over a decade of experience in the industry.
We specialize in sapphires and spinels, serving international markets with a focused range of natural gemstones.
Our collection includes faceted sapphires in various colours such as blue, pink, yellow, peach, green, white, violet, purple, teal, orange, and red shades, along with rubies, star sapphires, and star rubies.
We also offer spinels, tsavorites, tourmalines, zircons, garnets, chrysoberyls, aquamarines, and other natural gemstones for collectors, jewelers, and buyers.
UPS Shipping (Standard Shipping): 7–10 working days (Free Shipping)
Handling Time: 1–3 business days after cleared payment.
FedEx Shipping: 1–3 business days (additional charge applies).
Customs duties or import taxes (if any) are the buyer’s responsibility.
PayPal accepted.
Stripe accepted.
Other payment methods can be arranged upon request.
We offer a 14-day return policy.
Returns are accepted only if the item is not as described or is damaged during shipping.
Buyer pays return shipping cost.
Item must be returned in original condition.
All items are carefully inspected before shipping. Photos and videos are recorded for reference until the transaction is completed.
Import duties, taxes, and charges (if applicable) are the buyer’s responsibility.
Yes, this is a natural earth-mined Cobalt Spinel from Sri Lanka, not synthetic or lab-created.
No. This gemstone is completely natural and untreated.
Cobalt Spinel is one of the rarest and most desirable spinel varieties, prized for its intense vivid blue color caused by traces of cobalt within the crystal structure.
Yes. This gemstone comes with a CGJ Sri Lanka certificate.
Yes, with a hardness of 8.0, Spinel is suitable for everyday jewelry wear with proper care.
Yes, you will receive the exact gemstone shown in the photos and videos.
Yes, we ship worldwide using UPS standard shipping (7–10 days, free). FedEx expedited shipping is also available.
We offer a 14-day return policy. Returns are accepted only if the item is not as described or damaged during shipping. Buyer pays return shipping cost. Item must be returned in original condition.