When it comes to determining the value of a diamond, one of the most common questions we hear at San Diego Gemological Laboratory is: “Are lab-grown diamonds appraised differently than natural diamonds?”
The short answer: yes—but not for the reasons most people think.
In this guide, we’ll break down the key differences between lab-grown and natural diamond appraisals, explain how both are evaluated, and clarify an important truth: lab-grown diamonds are real diamonds in every scientific sense.
Natural diamonds are formed deep within the Earth over billions of years under extreme heat and pressure. They are mined from the earth and then cut, polished, and graded.
Lab-grown diamonds are created in controlled laboratory environments using advanced technological processes such as:
These processes replicate the natural conditions under which diamonds form.
Yes – 100%. Lab-grown diamonds are:
They are not simulants like cubic zirconia or moissanite. Even trained gemologists require specialized equipment to distinguish between lab-grown and natural diamonds.
A professional diamond appraisal evaluates several key factors:
Even though lab-grown diamonds are physically identical to earth-mined diamonds, they are more plentiful and can be created on demand. This lack of rarity causes their market value to be lower, which directly impacts appraisal value.
Jewelry appraisals are typically based on retail replacement value, not resale value.
This is especially important for insurance purposes, where accuracy matters.
Professional appraisals must clearly identify:
Advanced gemological tools are often used to confirm origin.
While lab-grown diamonds are growing in popularity, natural diamonds still carry:
These factors influence appraisal value, even though they dont affect the diamond’s physical properties.
Whether your diamond is lab-grown or natural, an accurate appraisal is essential for:
At San Diego Gemological Laboratory, we specialize in independent, unbiased appraisals for both lab-grown and natural diamonds.
Both options offer unique advantages:
From an appraisal standpoint, the difference comes down to market economics – not quality.
Lab-grown and natural diamonds are scientifically identical, but their appraisal values differ due to market dynamics, rarity, and consumer demand.
Understanding these differences ensures you:
If you need a trusted, expert written evaluation, San Diego Gemological Laboratory provides comprehensive diamond appraisals for both lab-grown and natural diamonds.
Contact us today to ensure your jewelry is accurately valued and fully protected.
Yes. While they are physically identical, lab-grown diamonds typically have lower market value due to higher supply and lower production costs.
Not always with the naked eye. Specialized gemological equipment is often required to accurately determine origin.
No. The grading process is the same, but the final appraised value is usually lower for lab-grown diamonds.
Yes. They can and should be appraised for insurance, but the replacement value will reflect their current market pricing.
They generally do not retain value as well as natural diamonds due to ongoing advancements in production and price reductions.
Maybe. If your insurance company requires a professional written appraisal to determine replacement value, if you are evaluating an estate for inheritance, if you are getting a divorce and splitting assets, a written appraisal may be useful. A written appraisal is not necessary if you only want to sell your jewelry.
Yes. Lab-grown diamonds will test as real diamonds on standard diamond testers because they have the same thermal and electrical conductivity as natural diamonds.
Lab-grown diamonds are more affordable because they can be produced in controlled environments, increasing supply and reducing rarity—unlike natural diamonds, which are limited by nature.
Yes. Lab-grown diamonds can be graded and certified by major gemological laboratories using the same standards as natural diamonds, including the 4Cs.
Yes. The origin (lab-grown vs. natural) affects the appraised value, which directly impacts the amount of insurance coverage needed and the replacement cost.
Lab-grown diamonds are generally not considered strong long-term investments, as their value tends to decrease over time due to advances in production and increased availability.
