The Complete Guide to Lab-Grown & Natural Diamonds
Lab-grown diamonds are chemically, physically, and optically identical to natural diamonds — same carbon structure, same Mohs 10 hardness, same brilliance. The difference is origin and price: lab-grown diamonds cost 50–80% less than comparable natural stones. Authored by Ara Talachian, Master Goldsmith & Certified Gemologist.
Quick Answer: 8 Key Facts About Diamonds
- Lab-grown = real diamonds — identical chemical composition, hardness (Mohs 10), refractive index (2.417), and optical performance to natural diamonds
- CVD vs HPHT — two lab-growth methods; neither is better; buy by certified grade (cut, color, clarity, carat), not growth method
- Certification matters — GIA, IGI, and GCAL are all reputable; always buy a certified diamond. What is an IGI certificate? →
- Cut is the most important factor — Excellent/Ideal cut determines brilliance, fire, and scintillation more than any other grade
- Type IIa does not mean better quality — 95–98% of CVD lab diamonds are Type IIa by default; don't pay a premium for it
- Ethics require verification — Kimberley Process covers conflict diamonds only; lab-grown avoids mining risks but still requires energy/labor verification
- Environmental impact varies — renewable-energy CVD labs have lower footprints; fossil-fuel labs may not
- Diamonds are extremely durable — hardest natural material (Mohs 10), but can chip along cleavage planes; inspect settings regularly
Lab-Grown vs Natural Diamonds: How to Choose
You value geological rarity and provenance. You're buying as a long-term investment or heirloom. You want a stone with documented mine-specific origin.
Read: Lab-Grown vs Natural FAQ →You want maximum size and quality for your budget (50–80% less than natural). You prioritize avoiding mining-related risks. You want IGI-certified quality with full transparency.
Read: Lab-Grown Buying Guide →Diamond Clarity & Quality Grades
VS2 and above is eye-clean for most buyers. SI1 can be eye-clean depending on inclusion placement. FL/IF grades carry a premium not justified by visible difference.
Read: Diamond Clarity Guide →Cut is the most important of the 4Cs — Excellent/Ideal cut maximizes brilliance regardless of color or clarity grade. G–H color is near-colorless and indistinguishable to the naked eye.
Read: Full Buying Guide →Certification: GIA vs IGI vs GCAL
Most recognized worldwide. Conservative, consistent grading. Best for natural diamonds and high-value purchases where resale matters.
Most widely used for lab-grown diamonds. Comparable grading to GIA at lower cost. DEEVE uses IGI certification.
What is an IGI Certificate? →Provides a Light Performance certificate guaranteeing optical performance. Strict grading standards. Highly respected.
Read the full certification comparison → | Diamond Certificates Explained →
Diamond Care & Durability
Warm water, mild dish soap, and a soft brush. Clean monthly for maximum brilliance.
Store separately — diamonds scratch other gemstones and metals. Use individual pouches or compartmentalized jewelry boxes.
Inspect prongs and settings every 6–12 months. DEEVE offers a lifetime warranty on all jewelry.
Read: Diamond Durability & Hardness → | Complete Jewelry Care Guide →
Want the full technical breakdown? Continue below for expert analysis of diamond formation, growth methods, optical physics, certification standards, ethics frameworks, and gemological science — authored by Ara Talachian, Master Goldsmith & Certified Gemologist.
1. Diamond Formation: Natural vs Laboratory
Natural diamonds form 100–200 km below Earth's surface over billions of years. Laboratory diamonds replicate this process in weeks. CVD uses methane gas plasma at low pressure; HPHT uses mechanical presses to recreate mantle conditions. Both produce genuine diamond crystal — not simulants like cubic zirconia or moissanite.
Read the full formation guide →
2. CVD vs HPHT: Technical Comparison
| Factor | CVD | HPHT |
|---|---|---|
| Pressure | Below 1 atm (near-vacuum) | 50,000–60,000 atm |
| Carbon source | Methane gas (CH4) | Graphite + metal catalyst |
| Diamond type | Type IIa (95–98%) | Type Ib / Ia (mostly) |
| Typical inclusions | Planar defects, silicon | Metallic flux (Fe, Ni, Co) |
| Growth rate | 0.1–0.5 ct/day | 0.5–1.0 ct/day |
| Hardness (Mohs) | 10 | 10 |
Read the full CVD vs HPHT guide →
3. Environmental Impact & Ethics
CVD lab-grown diamonds powered by renewable energy have substantially lower carbon footprints than mined diamonds. The Kimberley Process covers ~99.8% of global rough diamond production but only addresses conflict financing. Lab-grown diamonds avoid mining-related conflict risks but still require verification of energy sources and labor conditions.
Environmental Impact Analysis → | Diamond Ethics & Traceability → | DEEVE Ethical Sourcing →
4. Lab-Grown Diamond Myths Debunked
Lab-grown diamonds are fake. They lose value immediately. They're not as hard as natural diamonds. Lab-grown means conflict-free automatically.
Lab-grown diamonds are real diamonds — identical crystal structure and Mohs 10 hardness. Both natural and lab-grown depreciate. Lab-grown still requires ethics verification.
Read: Myths Debunked →The definitive pillar guide — everything you need to know before you buy
Read Pillar Guide →Step-by-step buying guide — cut, color, clarity, certification, and budget
Read Guide →FL to I3 clarity scale, inclusion types, eye-clean grades, and which clarity to choose
Read Guide →Process differences and quality outcomes
Read Guide →Complete FAQ and buyer's guide
Read Guide →European grading standards and whether to trust HRD for lab-grown diamonds
Read Guide →Which is better for lab-grown diamonds? Full comparison
Read Guide →Which certificate should you trust?
Read Guide →Natural geological process vs laboratory synthesis
Read Guide →Mining vs laboratory analysis
Read Guide →Mohs scale, toughness, and everyday wear
Read Guide →Separating science from marketing
Read Guide →Kimberley Process, blockchain, and conflict-free verification
Read Guide →Browse all articles: Diamond Education Blog → | Full Article Index →
All DEEVE diamonds are IGI certified and set in solid 14K gold. Learn about IGI certification → | Jewelry Size Chart → | Lifetime Warranty → | Jewelry Care Guide →