Searching for the best lab grown diamond company can feel overwhelming. There are dozens of brands claiming to offer the best stones, the best prices, and the best service. But "best" means different things to different buyers. Some people prioritize price. Others care most about certification, metal options, or after-sales support.
This guide walks through the factors that actually matter when comparing lab grown diamond companies, so you can decide which one is best for you.
What Makes a Lab Grown Diamond Company "Best"?
There's no single answer, but there are several factors that separate a good lab grown diamond company from a mediocre one:
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Certification — Are the stones independently graded by IGI or GIA?
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Metal options — Do they offer a full range of gold colors and platinum?
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Pricing — Are prices transparent and competitive?
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After-sales support — What do returns, warranties, and resizing look like?
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Customer experience — Is the buying process clear and pressure-free?
A company that excels in all five areas is rare. Most brands are strong in some and weaker in others. The best company for you depends on which factors you care about most.
Certification: The Non-Negotiable
Certification is the most important factor when comparing lab grown diamond companies. Without it, you have no independent verification of what you're buying.
IGI (International Gemological Institute) and GIA (Gemological Institute of America) are the two leading certification bodies. Both grade diamonds on the 4Cs: cut, color, clarity, and carat weight. GIA has a longer history, while IGI has broader coverage in the lab grown diamond space.
At Ecglosty, every stone is IGI certified. That means you can compare grades across different stones with confidence, knowing the assessment was done by an independent lab.
Metal Options: Where Many Companies Fall Short
Many lab grown diamond companies offer only a limited selection of metals. Some charge extra for rose gold. Others don't offer platinum at all. This can be frustrating if you have a specific look in mind.
At Ecglosty, we offer 14K and 18K white gold, yellow gold, rose gold, and platinum across our entire collection. No hidden fees, no limited-time metal options.
If metal selection matters to you, check what each company actually offers before you commit.
Pricing: Transparency Matters
Lab grown diamonds are generally 30% to 50% cheaper than mined diamonds of the same quality. But pricing varies widely between companies.
Some brands use ultra-low listing prices to attract clicks, then charge extra for certification, metal upgrades, or resizing. Others keep pricing simple and transparent.
When comparing lab grown diamond companies, look at the total cost, not just the listed price. Factor in:
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Certification costs (if any)
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Metal upgrade fees
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Shipping charges
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Return and resizing fees
Ecglosty keeps pricing competitive and transparent. Every piece ships free, and free resizing is standard.
After-Sales Support: What Happens After You Buy
A company's return policy, warranty, and resizing options say a lot about how they treat customers.
| Policy | What to Look For |
|---|---|
| Returns | 30 days or more, free return shipping |
| Warranty | Lifetime coverage for manufacturing defects |
| Resizing | Free or low-cost, especially within the first year |
| Shipping | Free, with tracking and insurance |
At Ecglosty, every order includes free shipping, 30-day returns, a lifetime warranty, and free ring resizing.
Customer Experience: Pressure-Free Buying
Some lab grown diamond companies use high-pressure sales tactics. They send promotional emails, create false urgency with countdown timers, or push upgrades you didn't ask for.
A better buying experience is transparent and pressure-free. You should be able to browse, ask questions, and make a decision on your own timeline.
How Ecglosty Compares
Here's how Ecglosty stacks up against the factors above:
| Factor | Ecglosty |
|---|---|
| Certification | IGI certified |
| Metal options | 14K/18K white gold, yellow gold, rose gold, platinum |
| Pricing | Competitive, transparent |
| Returns | 30-day free returns |
| Warranty | Lifetime |
| Resizing | Free |
| Shipping | Free |
If you're looking for a lab grown diamond company that checks all these boxes, Ecglosty is worth considering.
Final Thoughts
The "best" lab grown diamond company is the one that aligns with your priorities. If certification matters most, look for IGI or GIA. If metal options matter, check the full range before you buy. If after-sales support matters, read the fine print on returns and warranties.
Ecglosty offers IGI certified stones, a full range of metals, competitive pricing, and comprehensive after-sales support. Browse our collection to see if we're the right fit for you.
Information current as of September 2026.