FAQ

Both are real diamonds.

Lab-grown diamonds are not imitations or substitutes. They have the same chemical composition, crystal structure, hardness and optical properties as natural diamonds.

The difference is origin. Natural diamonds form within the earth over geological time, while lab-grown diamonds are created in a controlled environment.

Lab-grown diamonds typically cost considerably less, allowing you to choose a larger or higher-specification diamond without compromising on the qualities that make a diamond a diamond.

The choice is simply about what matters most to you.

Our Diamond Guide explores the differences in greater detail.

Yes. Every diamond offered by Mont Sassière is accompanied by an independent grading report.

The laboratory and report details are displayed with each diamond. A grading report independently documents the diamond's characteristics, including measurements, color, clarity and other relevant grading information.

What you see is selected, not limited.

Our diamond collection is intentionally filtered to our standards, so you see considered stones rather than an endless list.

Contact us with what you're looking for.

We can search beyond the diamonds currently displayed for a particular size, shape, color or specification.

The collection is a starting point, not the limit of what we can find.

Share what you have in mind and what matters most to you.

A member of Mont Sassière will search on your behalf, present considered options and explain the differences clearly.

Yes. Contact us with your idea and we'll discuss the diamond, design and what's possible.

Begin with a diamond in The Vault or choose a setting in Ring Studio. For a bespoke design, speak with Mont Sassière.

A Note on Product Imagery

We take care to represent each piece as faithfully as possible. Variations in lighting, screen settings, photography, and the natural characteristics of gemstones and precious metals may affect their appearance. Images may be enlarged to reveal design details and may not reflect actual scale. Please refer to the product specifications for precise details.

My Account is your Mont Sassière account, accessible through the person icon at the top of every page. Sign in to view your orders and account details.

Complimentary standard shipping is available in the United States, with delivery in 5–10 business days.

For international shipping, please contact us.

Eligible discretionary returns within the United States must be authorized: please request a return within 14 calendar days after delivery.

Eligible discretionary returns carry a 10% restocking fee, with a $50 minimum, where legally permitted. The fee never exceeds the merchandise purchase amount.

Mont Sassière pays approved insured return shipping for authorized returns through its designated return process.

Returned jewelry must be in its original condition: unworn, unaltered, undamaged, and returned with all original packaging, documentation and certificates.

Requests made after 14 days require special approval, except where the law provides otherwise.

Confirmed defective or incorrect merchandise carries no restocking fee. Please notify us within five calendar days of delivery whenever possible so we can arrange a correction or resolution at no added cost.

Nothing here limits your statutory consumer or warranty rights, or the withdrawal and warranty rights you hold outside the United States. The U.S. restocking fee is not applied where prohibited. Supplier terms do not override your rights.

Email concierge@montsassiere.com, or choose Contact below to send an enquiry. A member of Mont Sassière will reply personally.