BLUE LABEL · 7-Day Worry-Free Refund Guarantee
Connerstone

LAB-GROWN DIAMOND GUIDE

Lab-grown diamonds: what to check before you choose

Lab-grown, lab-created and lab diamonds are three names for the same gem. It is grown in a controlled environment, yet it has the same carbon crystal structure as a natural diamond, which sets it clearly apart from simulants of a different composition such as cubic zirconia and moissanite.

Rather than judging by growth method alone, compare each stone’s grading report number, 4C grades, real video, measurements and proportions, fluorescence and price side by side. If the stone is going into jewelry, weigh the setting, the metal, how you will wear it and the aftercare in the same comparison.

CURRENT INVENTORY

Lab-Grown Diamond Prices by Carat

These are the lowest prices in each carat band among stones currently for sale. Even at the same carat, price varies with cut, color, clarity and grading lab, so open a band to compare individual stones and their reports.

Lowest price and stock by carat band
CaratLowest priceIn stockGo to listing
0.3 CaratFrom $3014,689View 0.3 Carat — 0.3 Carat stones
0.5 CaratFrom $687,972View 0.5 Carat — 0.5 Carat stones
0.7 CaratFrom $1062,219View 0.7 Carat — 0.7 Carat stones
1 CaratFrom $15217,124View 1 Carat — 1 Carat stones
1.5 CaratFrom $2752,224View 1.5 Carat — 1.5 Carat stones
2 CaratFrom $3823,321View 2 Carat — 2 Carat stones
3 CaratFrom $535877View 3 Carat — 3 Carat stones
5 Carat & UpFrom $7654,671View 5 Carat & Up — 5 Carat & Up stones

Basis: Round, D–E color, VS2 clarity or better, Excellent cut or better. Figures change with inventory and may be cached for up to 10 minutes. Check the stone detail page for the latest price and availability.

See every Lab-Grown Diamond in stock

What to compare

HPHT and CVD

HPHT recreates the high pressure and temperature in which natural diamonds form and grows the crystal under them; CVD builds the crystal up atom by atom from a carbon-bearing gas. Either way the result is pure crystalline carbon, with the hardness and refractive index of a natural diamond, and it is graded on the same 4C scale.

The stone matters more than the method

Neither method is always better. Final quality comes down to the individual stone: its color, clarity, cut, any post-growth treatment disclosed and the result of its grading.

Checking the grading report

Note the grading lab and the report number, then look the report up on that lab’s own verification service and confirm that the weight, measurements, grades and girdle inscription match the listing. A report is not decoration for a sales page; it is how you confirm you are getting that exact stone.

Comparing prices

At the same carat weight, cut, color, clarity, shape and measurements change both how a stone looks and what it costs. Compare the current selling price together with the setting, the production time and the exchange and return terms rather than a discount rate on its own.

Choosing the jewelry

For a ring you will wear every day, check the prong height and band thickness; for a necklace, the chain length and whether the pendant flips; for a tennis bracelet, the clasp and how freely it moves. The stone’s grades and how the finished piece wears are separate choices.

BEFORE YOU ORDER

Checklist before you order

  1. Report number matches the girdle inscription
  2. Cut, color, clarity, carat and the actual measurements
  3. Disclosed treatment and growth method
  4. Setting metal and production time
  5. What exchanges, returns and repairs cover

Frequently asked questions

Are lab-grown, lab-created and lab diamonds the same thing?
Yes. All three names describe a diamond grown in a laboratory, and the name does not change the product, so look first at the grading lab, the report number and the 4C grades. Cubic zirconia and moissanite, on the other hand, are simulants with a different composition, so always check the material stated in the product details.
What is the difference between CVD and HPHT?
HPHT grows the crystal by recreating the high pressure and temperature in which natural diamonds form, while CVD deposits carbon atoms layer by layer from a carbon-bearing gas. Both produce pure crystalline carbon graded on the same 4C scale, so comparing each stone’s cut, color, clarity and disclosed treatments tells you more than the method itself.
How do I check a grading report?
Find the grading lab and the report number, then use that lab’s official verification service to confirm that the weight, measurements, grades and girdle inscription match the product details. Reports for laboratory-grown stones also state the growth method and any treatment, so read those lines as well.
How does the price compare with a natural diamond?
At the same carat weight and grades, a lab-grown diamond sits in a lower price range than a natural one, so the same budget can reach a larger stone or higher grades. Actual prices move with cut, color, clarity, shape and stock, so check the carat-by-carat table on this page for the stones on sale right now.