Do you offer engraving?

Select jewelry in our collections may be engraved where noted. You may include the message you would like to have engraved at checkout.

Can I resize my jewelry?

Only a selection of our rings can be resized. You would need to contact our customer care curator team to discover if your ring can be resized.

Because your wellbeing is essential, Oscar Massin might you either an adjustment service to make sure your ring perfectly fits you with the highest level of comfort or simply an exchange or your product.


Our Maison jewelry experts apply their technical know-how to finely shape the metal of a ring, modify the length of a chain, adapt the post or clip mechanism of an earring.

Performed within at least 3 weeks, this service is always undertaken with respect to the original technical and aesthetic specifications of each creation.

Is Oscar Massin fine jewelry waterproof?

We use only 18K, 100% recycled white and yellow gold, which stands up to moisture and resists tarnish.

Why do the backs of my earrings appear bent?

We believe that fine jewelry is to be worn, celebrated, and shared with the world. Our medium diamond hoop earrings from our Beaded collection are intentionally designed with an angle that prevents the jewelry from touching your cheeks as you move. Experience the collection in AR.

What are lab-grown diamonds?

Lab-grown diamonds are created using Chemical Vapor Deposition (CVD), a diamond growth process that uses the highest quality Type IIA diamond “seeds” and grows them in specialized greenhouse-like chambers that mirror natural growth conditions. This results in 100% climate-neutral diamonds with full origin traceability— physically, atomically and optically identical to their mined counterparts.

What are Latitude™ Diamonds?

Latitude® diamonds are 100% climate-neutral lab grown diamonds using CVD technology; the diamonds are “as grown,” meaning they have no post-growth enhancements, resulting in the highest, type IIA purity level—present in only 1-2% of diamonds across the globe—both physically and chemically identical to their mined counterparts.Latitude® diamonds are the first to be SCS-certified and achieve 100% climate neutrality.

What is the 5th c?

As a general principle, diamonds are assessed according to the “4cs:” Cut, Clarity, Color and Carat weight. We also assess our diamonds against a 5th “C” of Climate neutrality.

What is climate neutrality?

​​Climate neutrality, certified by SCS (Scientific Certification Systems international leader in third-party certification, validation, and verification for environmental, sustainability, and food safety and quality) performance claims) refers to reaching net zero greenhouse gas emissions by balancing those emissions so they are equal (or less than) the emissions that are removed through the earth’s natural absorption.

Does Oscar Massin repurpose or reuse my gold?

At this time, we are unable to offer upcycling or repurposing services.

Where may I try on Oscar Massin fine jewelry?

Starting in April 2022, the Oscar Massin collections will be available in the following NYC and Beverly Hills-based Saks 5th Avenue boutiques:


12 E 49th St, New York, New York, 10017

9600 Wilshire Boulevard, Beverly Hills, CA, 90212

If you do not live nearby one of our boutiques, we suggest using our advanced VR tech for a fully immersive experience with our jewelry. View in AR.

What is a Rose Cut diamond?

Rose Cut diamonds are designed to resemble the shape of a rose bud and hold between 3- 24 facets. Rose cut diamonds are unique for their flat base, which allows a larger surface area for illuminating the diamond’s brilliance. Our Rose Cut lab grown Latitude™ diamonds are among the finest stones to be certified under the SCS Global Services' Third-Party Certification guidelines and reflect the highest-level of sustainability rating.