You found a 1ct E VS1 IGI-certified lab diamond stud on Brilliant Earth for $1,800. The same stone — same grade, same certification — costs $1,100 on Lihara. That is not a sale. That is not a coupon code. That is a $700 difference on a piece of jewelry that started in the same lab.

So what is going on?

The Lab Diamond Supply Chain (The Part Retailers Don't Talk About)

Here is how a lab diamond actually moves from creation to your ears.

A grower — a facility using either CVD (chemical vapor deposition) or HPHT (high pressure, high temperature) technology — produces a rough diamond crystal. That rough stone goes to a cutter and polisher, often in Surat or Mumbai. From there, a finished, certified stone enters the wholesale market, where retailers purchase it.

Every retailer in the lab diamond space — Brilliant Earth, James Allen, With Clarity, Lihara — buys from the same wholesale ecosystem. The stones are commodities. A 1ct E VS1 round brilliant is a 1ct E VS1 round brilliant regardless of whose website it ends up on.

The price difference has nothing to do with the diamond. It has everything to do with what sits on top of it.

What You're Actually Paying for at Luxury Lab Diamond Retailers

When you buy a $1,800 stud from a premium lab diamond brand, you're paying for several things that have nothing to do with your stone:

Showroom overhead. Brilliant Earth operates physical showrooms in cities across the United States. Retail leases in Manhattan, San Francisco, and Chicago are not cheap. That cost gets distributed across every sale.

Marketing and celebrity partnerships. Premium brands spend heavily on influencer deals, editorial placements, and brand-building campaigns. These are real costs — and they end up in your price.

Luxury brand tax. Positioning a lab diamond brand as a premium, aspirational product requires premium, aspirational pricing. The markup is partly structural and partly psychological. Consumers expect luxury brands to cost more. The brands are happy to oblige.

Investor growth targets. Several major lab diamond retailers are venture-backed and optimizing for revenue and margin, not for giving you the lowest possible price.

None of this is necessarily dishonest. But it is worth understanding before you hand over your credit card.

The Math, Plainly

Industry margin data and reporting from trade publications like Rapaport and National Jeweler have consistently documented retailer markups in the 200–400% range on lab diamond jewelry.

That means a stone that costs $300–$400 at wholesale can retail for $900–$1,600 at a premium brand — before the setting costs even factor in.

Lihara operates differently. No showrooms. No celebrity ambassadors. No flagship retail presence. We source directly from the same supply chain and pass the margin savings to you. Our markup is intentionally lean. That is the model.

The result: the same stones, at 30–40% lower prices — you can compare them directly on our pricing page.

How to Evaluate Any Lab Diamond Price

Before you buy lab diamond jewelry anywhere, here's what to ask:

1. Is the stone certified? Look for IGI (International Gemological Institute) or GIA (Gemological Institute of America) certification. IGI is the dominant lab for lab-grown stones and is widely accepted. GIA certification exists but is rarer for lab diamonds. Any stone without independent third-party certification is a red flag.

2. Can you see the actual stone specs before checkout? A trustworthy retailer shows you the cut grade, color, clarity, and carat weight upfront — not buried in a PDF after you've already clicked "add to cart." If you have to dig for this information, that is intentional.

3. What is the actual price per carat? Divide the total price by the carat weight and compare apples to apples across retailers. A brand that leads with a lower entry price may be selling a smaller stone or lower-grade color and clarity.

4. Does the brand explain its pricing? Lihara publishes its pricing model. We'll tell you how we source, what our margins look like, and why our prices are lower. Most competitors will not have this conversation. We think that says something.

Learn more about how we source and certify our stones on our About Our Stones page.

IGI vs. GIA: Does It Matter?

For lab-grown diamonds, IGI is the standard. GIA only began grading lab diamonds in 2020 and initially used different (arguably stricter) color and clarity nomenclature. IGI has graded lab diamonds far longer and issues the certificates you'll see most commonly.

Both are legitimate third-party graders. What matters is that the stone has some independent certification. An uncertified lab diamond has no verifiable grade — you're trusting the retailer's description entirely.

All Lihara stones are IGI-certified. The certificate information is visible before you purchase.

The Transparency Test

Here is the simplest way to evaluate any lab diamond retailer: does the brand show you what you are getting before you are asked to commit?

Specific stone grades: yes or no. Actual price per carat: visible or buried. Explanation of why their prices are what they are: present or absent.

Pricing opacity is a feature, not a bug, for brands with high markups. If showing you the math would hurt their sales, they will not show you the math.

We show you the math.

The Bottom Line

Lab diamond prices are different because retailer cost structures are different. The stone is the same. What you pay above the wholesale price funds someone's showroom, someone's influencer deal, or someone's investor return.

You do not have to pay for all of that to get a certified, high-quality lab diamond.

See how Lihara prices compare — same stones, no spin.

Browse our stud earring collection and see what the same IGI-certified stone costs when the overhead is gone.

All Lihara lab diamond jewelry includes IGI certification documentation. Stone specs — cut, color, clarity, and carat weight — are listed on every product page before checkout.