How to Read Your Moissanite Certificate: A Complete Guide

Every Moissanite Shine stone comes with a GRA (Gemological Research Association) certificate — a document that records the stone's measured properties and serves as the official record of what you purchased. This guide explains every field on a GRA moissanite certificate, what the grades mean, and how to use the certificate to verify your GRA certified moissanite ring.

What Is a GRA Certificate?

A GRA certificate is a grading report issued by a gemological laboratory after examining a specific stone. The certificate records the stone's measured physical and optical properties — not estimates, but measurements taken with specialized equipment under controlled conditions. Each certificate has a unique certificate number that identifies the specific stone and can be verified through GRA's system. Every moissanite engagement ring for sale from Moissanite Shine ships with its full GRA certificate.

Certificate Fields Explained

Certificate Number: A unique identifier for this specific stone, laser-inscribed on the stone's girdle, allowing the physical stone to be matched to its certificate at any time. This is your proof of authenticity when you buy moissanite engagement ring online.

Shape and Cutting Style: The stone's outline shape (Round, Oval, Cushion, Emerald, Pear, Heart, Marquise) and faceting style (Brilliant, Step, Mixed). "Round Brilliant" is the most common in our moissanite ring collection — maximizing light return.

Measurements: The stone's physical dimensions in millimeters (length x width x depth). These confirm the stone's actual face-up size — which determines appearance, not carat weight.

Carat Weight: The stone's weight in carats. Moissanite is less dense than diamond (specific gravity 3.21 vs. 3.52), so a moissanite of the same physical size as a diamond weighs approximately 10% less. Certificates may list "diamond equivalent weight" (DEW). When sellers describe a moissanite engagement ring as "1 carat," they typically mean 1 carat DEW.

Color Grade: Graded on a scale adapted from diamond color grading:

• DEF (Colorless): No discernible color to the naked eye. All Moissanite Shine DEF VVS1 moissanite engagement rings carry this grade — equivalent to D, E, or F on the diamond scale.
• GHI (Near-Colorless): Very slight warmth visible only under close examination. Suitable for warm metal settings like yellow or rose gold.
• JKL and below: Visible warmth or tint. Not used in Moissanite Shine products.

Clarity Grade: Describes the absence of internal inclusions and surface blemishes:

• VVS1 / VVS2: Inclusions extremely difficult to see under 10x magnification and invisible to the naked eye. All Moissanite Shine moissanite rings are VVS1 or better.
• VS1 / VS2: Inclusions difficult to see under magnification; invisible to the naked eye. Excellent everyday clarity.
• SI1 / SI2: Inclusions visible under magnification. Not used in Moissanite Shine products.

Cut Grade: Evaluates faceting precision, angles, and symmetry. Scale: Excellent, Very Good, Good, Fair, Poor. All Moissanite Shine moissanite engagement rings are Excellent cut — the highest grade for optimal brilliance and fire.

Polish: Evaluates surface finish quality. Excellent polish means smooth facets free of lines or irregularities. All Moissanite Shine stones carry Excellent polish.

Symmetry: Evaluates precision of facet placement and geometric regularity. All Moissanite Shine moissanite jewelry carries Excellent symmetry.

Fluorescence: The stone's response to ultraviolet light. Moissanite typically shows None or Faint fluorescence — no impact on appearance in normal lighting conditions.

Comments: Additional grader observations — girdle inscription confirmation, material identification (silicon carbide), or stone-specific characteristics.

How to Verify Your Certificate

1. Locate the certificate number on your certificate document.
2. Examine your moissanite ring stone's girdle under magnification — the number should be laser-inscribed there.
3. Visit GRA's official verification page and enter the certificate number to confirm authenticity.
4. Confirm the stone's measured dimensions match your physical stone using a jeweler's gauge.

All Moissanite Shine stones are GRA certified moissanite — DEF/VVS1, Excellent cut, polish, and symmetry. Explore our full collection of moissanite engagement rings for sale, backed by our moissanite jewelry lifetime warranty and Lifetime Upgrade Program.

Also explore our certified moissanite stud earrings, moissanite pendant necklaces, and moissanite tennis bracelets — all GRA certified, all DEF VVS1.