First, identify what is actually being priced
Is the quote for a loose diamond, a ring, or a package that includes design and setting? Is the center stone natural or laboratory grown? Is the price before tax, shipping, financing, insurance, or customization? A low number that excludes the setting is not a low ring price.
Write each component as its own row. If the seller cannot separate the center stone from the setting and service, you may not have enough information to compare the quote fairly.
Then match the quality language
Match the grading laboratory, report number, shape, measurements, carat weight, color, clarity, cut grade when applicable, polish, symmetry, fluorescence if reported, and any treatment or growth-process notes. IGI describes its report as the common language used to document the characteristics that influence a diamond’s value. [Read the official IGI report overview](https://www.igi.org/reports/lab-grown-diamond-report/).
Do not let “excellent quality” substitute for a report field. Marketing adjectives are not a grading scale. The report and the actual stone should do the specific work.
Use a comparison grid, not a feeling
Create columns for seller, report, shape, measurements, color, clarity, cut or finish, setting metal, side stones, return window, warranty, resizing, total delivered price, and what support is included. This turns a polished sales conversation into an audit trail.
For the diamond itself, calculate price per carat only after the stones are genuinely comparable. Price per carat is a sorting tool, not a verdict. A shallower or deeper stone, a different shape, a different report, or a different service package can make the number misleading.
Look for the markup you can actually evaluate
Retail overhead is real, but “markup” is not a complete explanation by itself. Some of the price may pay for design, labor, warranty, financing, inventory risk, or an in-person service model. The buyer’s job is to decide whether those layers are useful for this purchase, and whether the diamond quality matches the total price.
IDAN’s role is to make the comparison visible. We do not claim every traditional jeweler is overpriced or every direct quote is good. We ask whether the buyer is paying for a better stone, better service, or simply more distance from the source.
The five-minute pre-purchase handoff
Before you buy, send the listing link, report, screenshots, and the complete quote. Include the intended setting, metal, budget, and deadline. A real second look can identify missing information even when it does not change the purchase decision.
If the comparison cannot be made honestly, that is useful information too. The best value decision is sometimes “buy this one,” sometimes “keep looking,” and sometimes “ask better questions first.”
Technical report explanations are cross-checked against IGI’s laboratory-grown diamond report guidance. Content design follows Google’s people-first guidance for original, useful, trustworthy pages.