Lab Grown Diamond Buying Guides

Our lab grown diamond buying guides focus on the decisions that apply to every piece of jewelry: how to read a grading report, how to weigh cut, color, clarity and carat against each other, and how to shop online safely. Use this hub before you compare specific rings, earrings or bracelets. It will help you spot the details that make two similar-looking listings very different.

Read the grading report first

A grading report from a laboratory such as IGI or GIA records a diamond’s shape, measurements, carat weight and quality characteristics. Before you buy, confirm that the report number in the listing matches the lab’s online database. Many stones also carry a tiny laser inscription of that number on the girdle that a jeweler can check with magnification. Reports for lab-grown diamonds identify the stone as laboratory-grown and may note the growth method and any detected post-growth treatment.

The 4Cs, in order of what you will notice

• Cut: how well the diamond is proportioned and finished. For round diamonds, cut has the biggest effect on brightness and sparkle.
• Color: graded on a letter scale where D is colorless. Near-colorless grades such as G and H can look white once set, especially in yellow or rose gold.
• Clarity: internal and surface characteristics. Grades such as VS1, VS2 and SI1 are often “eye-clean,” but it depends on the size and position of each inclusion, so review the plot or photos.
• Carat: weight, not size. Two stones of the same weight can face up differently depending on their depth, so compare millimeter measurements as well.

HPHT vs. CVD

Both growth methods produce real diamond. The method alone does not make a stone better or worse; the graded quality of the individual diamond matters more. If a report notes post-growth treatment, factor that into your comparison and ask the seller about it.

Compare price fairly

Comparing price per carat between stones with the same shape, cut, color and clarity is a useful way to see whether a listing is in line with others. Prices for lab-grown diamonds vary widely between retailers and change over time, and resale value is generally limited, so buy something you will enjoy wearing.

Shop online safely

Read the return policy (length of the window, condition requirements and who pays return shipping), the warranty (what is covered, such as lost side stones or prong repair, and for how long) and the resizing terms. Check that shipping is insured, and keep the report, receipt and product photos together.

Lab-grown vs. natural diamonds

The two are the same material. Lab-grown diamonds must be disclosed as such under the FTC’s Jewelry Guides. Choosing between them comes down to budget, personal values and how much resale value matters to you. Learn more on our lab grown diamonds page.

How we write these guides

Our guides draw on published grading standards, retailer product information and FTC guidance. We do not claim hands-on testing unless a guide says so, and we never invent prices, ratings or reviews. New guides appear below as they are published.