Diamonds and certificates
What a laboratory report states about a stone and what a jeweler's listing adds to it: cut labels, grades and the words used for them. Every figure is read from the report and the listing on a stated day.
Five lines we check on every diamond
Every guide here reads these lines on the jeweler's own page and dates what it found. The full method is on how we check.
- 01
Listing
What the jeweler's page says about the stone, in its own words
- 02
Certificate
What the laboratory report states, and what it leaves out
- 03
Cut label
Whether a cut term is the lab's grade or the jeweler's own
- 04
Rule
The FTC Jewelry Guides wording for the terms used
- 05
Date
The day each document was read
Every diamond guide
Each one prints the date its figures were read and the date they will be read again.
Super Ideal against the IGI report
One oval sold as Super Ideal, read against its IGI report, and how three jewelers define their top cut label.
Lab-grown diamond prices at five jewelers, one spec
The cheapest round lab-grown stone, 1.00 to 1.50 ct, F-G, VS1-VS2, IGI, at five jewelers on one day, with price per carat.
Lab-grown diamond wording against the FTC Jewelry Guides
What three Guides sections and the FTC's 2018 reasoning say, beside what five jewelers write on their lab-grown pages, counted.