How to Write a Diamond Appraisal: A Step-by-Step Guide for Jewelers

A well-written diamond appraisal protects your client, supports their insurance coverage, and reflects on your store's professionalism. But appraising a diamond is more than filling in a value — it's a structured document that identifies the stone, states a defensible value with a clear basis, and carries the credentials of the person who signed it. This guide walks through exactly what a diamond appraisal should contain and how to produce one efficiently.

Appraisal vs. Market Estimate: Know the Difference

Before writing anything, be clear on what kind of value you're stating. A diamond can carry three very different numbers, and conflating them is the most common appraisal mistake.

• •Retail replacement value — what it would cost a consumer to buy an equivalent diamond at retail today. This is the highest figure and the one most insurance appraisals use.
• •Fair market value — the wholesale/market price the trade actually pays, benchmarked against the Rapaport price list. This sits well below retail.
• •Resale value — what a consumer would actually receive reselling the stone, typically 25–50% of retail.

What Every Diamond Appraisal Must Include

A complete, defensible appraisal documents each of the following. Missing any of these is the difference between a professional appraisal and a slip of paper an insurer may reject.

• •Diamond identification — shape, carat weight, color, clarity, cut, polish, symmetry, fluorescence, and measurements.
• •Certification reference — the GIA (or other lab) report number, so the grading can be independently verified.
• •Mounting & setting — item type (ring, pendant, etc.), metal, setting style, and any side stones with total carat weight.
• •Appraised value — the figure, with the value type stated (e.g. 'retail replacement value').
• •Basis of value — a brief note on how the value was determined (current retail comparables, Rapaport benchmark, etc.).
• •Appraiser details — printed name, credentials/license, date, and a signature.
• •A unique appraisal number — so the document can be referenced, reissued, and tracked.

Step by Step: Writing the Appraisal

With the inputs gathered, the workflow is straightforward:

• •Pull the grading data. Start from the GIA report — enter the report number or scan the certificate so the 4Cs, proportions, and clarity characteristics are captured accurately rather than transcribed by hand.
• •Describe the complete item. Document the mounting and setting, not just the loose stone. Insurers cover the piece, so the metal, style, and side stones matter.
• •Choose and state the value. Decide whether you're stating retail replacement value (typical for insurance) and set the figure. Note the basis.
• •Add your letterhead and credentials. Your store name, the appraiser's name, license or gemological credentials, and the date establish authority.
• •Sign and number it. A wet or digital signature and a unique appraisal number make the document official and traceable.
• •Deliver a clean, printable copy. The client will hand this to an insurer — it should look like a formal document, not a quote.

Choosing the Value: Why Appraised Value Sits Above Wholesale

Insurance appraisals state retail replacement value — the cost to replace the diamond at retail — which is intentionally higher than the wholesale/market price. That is correct and expected: your client needs enough coverage to actually replace the stone. The key is that the value is defensible. Benchmarking against current retail comparables and the Rapaport price list gives you a documented basis rather than a guess.

Speeding It Up: Generate the Appraisal Online

Writing each appraisal from a blank template is slow and error-prone. DiamondCheck AI's appraisal tool pulls the GIA grading data, clarity plot, and proportions automatically, then lets you add your store name, your own appraised value, mounting details, and signature — and prints a branded, numbered PDF you can hand to the client. Every appraisal is saved to your account so it can be reissued or referenced later.