Moissanite is a stunning, lab-grown gemstone originally discovered in a meteor crater by scientist Henri Moissan in 1893. Made of silicon carbide, it is famous for having even more "fire" and sparkle than a diamond.

Lab-grown diamonds are created in a lab, It is made of 100% pure carbon, arranged in a crystal lattice identical to diamonds mined from the earth. While natural diamonds form in the earth over billions of years. Moissanite is a diamond simulant. It is made of silicon carbide. While it looks like a diamond, it is a different mineral that was originally discovered in meteorites.

Absolutely! Moissanite is created in laboratories with no mining required, making it one of the most ethical and environmentally friendly gemstone choices available. You can wear your Kōsei Moissanites jewelry with complete peace of mind.

Yes, all our moissanite stones come with a certificate of authenticity from reputable sources. Each certificate guarantees the quality and specifications of your moissanite, including its size, color, and clarity grade.

No! Moissanite is incredibly durable and maintains its brilliance forever. It will sparkle just as beautifully decades from now as it does today.

Moissanite offers exceptional brilliance and fire that actually exceeds diamonds, incredible durability for everyday wear, and outstanding value—allowing you to get a larger, more brilliant stone for your budget. Plus, moissanite is 100% ethical and sustainable with no mining required.

Absolutely! Our design team specializes in bringing your vision to life. Whether you have a sketch, inspiration photos, or just an idea, we'll work with you to create a one-of-a-kind piece. Just do it here.

At Kosei Moissanites, we work directly with premium moissanite suppliers and manufacture our own settings, eliminating middlemen markups. This allows us to offer exceptional quality at fair prices, typically 40-60% less than traditional retailers.

Yes, we offer complimentary engraving on most rings. You can add a special message, date, or initials up to 25 characters to make your ring even more meaningful.

Our collection features an exquisite array of moissanite jewelry—from timeless rings and necklaces to radiant earrings and bracelets—each piece masterfully crafted to capture the light.

From the timeless grace of a classic solitaire to the intricate shimmer of a romantic halo, our collection features a diverse array of settings. Whether you prefer a sleek modern bezel or a delicate pavé design, every piece is masterfully crafted to highlight the extraordinary fire of your moissanite.

Yes! We offer 925 sterling silver, 10K, 14K and 18K white gold, yellow gold, rose gold, and platinum. You can create your custom made jewelry, Our team can help you choose the best option for your lifestyle and preferences.

Clean your jewelry regularly with warm water, mild soap, and a soft brush. Avoid harsh chemicals and remove your jewelry during heavy activities.

Order processing begins within 24–48 hours of payment. Expect your piece to be crafted and ready within 8–10 business days. Custom made designs and certified stones need 10–12 business days—we take this time to ensure your piece is crafted with care and authenticated with precision.

We understand plans can change! You can adjust or cancel your order within 24 hours before we start production. Thank you for your understanding and support. If you want to change or cancel your order, please contact us here or email us on koseimoissanite@gmail.com. For more details, please read our Cancellation Policy.

You can follow our size chart to measure your ring size accurately at home.

Global shipping available! We deliver to the US, UK, Europe, and more. Check our full list on the shipping page.

We offer free worldwide shipping on all orders means your investment reaches you without compromise—delivered seamlessly to your door, anywhere globally. See more in detail.

We ship worldwide. We ship through UPS, USPS, or Aramex—trusted carriers that get your pieces to you safely and on time.

Your jewelry will arrive within 18–20 days from your order date, with this timeframe covering both production and shipment. Read full details here.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. Please see our full Return & Refund Policy for more details.

No, it's not mandatory. However, it is highly recommended. Creating an account allows you to view your order history, manage your addresses, and track your parcel online faster. You will also be notified of new products and special events.

Absolutely not. We never have access to your payment information. All transactions are securely processed by Shopify payment, a trusted global payment provider. Your data is completely safe.

We accept Visa, MasterCard and American Express cards. Alternatively, you can finalize your order with PayPal payment service.