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Lab Grown vs Natural Diamond: Property Comparison & Buying Guide Lab grown diamonds and natural diamonds are physically, chemically, and optically identical. Both are pure carbon with a cubic crystal structure. The difference is formation: natural diamonds form over billions of years in the Earth's mantle; lab grown diamonds are created in weeks using HPHT or CVD processes. The FTC confirmed in 2018 that lab grown diamonds are diamonds. Physical Property Comparison Property Lab Grown Diamond Natural Diamond Identical? Chemical composition Carbon (C) Carbon (C) Yes Crystal structure Cubic (isometric) Cubic (isometric) Yes Hardness (Mohs) 10 10 Yes Refractive index 2.417 2.417 Yes Dispersion (fire) 0.044 0.044 Yes Density (g/cm3) 3.52 3.52 Yes Thermal conductivity (W/mK) 2,200 2,200 Yes Fluorescence Varies by stone Varies by stone Yes Distinguishable by eye/loupe No No Yes Formation time Weeks 1–3 billion years No Price (4.5ct tennis bracelet, 14K) ~$1,450 ~$8,000–$15,000 No Resale value Low Moderate (30–50% loss) No Moissanite vs Diamond Comparison Moissanite is sometimes marketed as a "diamond alternative" but is a fundamentally different mineral — silicon carbide (SiC), not carbon (C). Property Diamond (Lab or Natural) Moissanite Chemical composition Carbon (C) Silicon carbide (SiC) Hardness (Mohs) 10 9.25 Refractive index 2.417 2.65 Dispersion (fire) 0.044 0.104 Density (g/cm3) 3.52 3.21 Thermal conductivity (W/mK) 2,200 490 Visual appearance White brilliance with fire More rainbow dispersion Is it a diamond? Yes No Price (4.5ct bracelet) $1,450 (lab) / $8,000+ (natural) $400–$800 Diamond Formation Methods Natural formation — Carbon crystallizes under extreme pressure (45–60 kbar) and temperature (900–1,300 C) in the Earth's upper mantle, 150–250 km below the surface. Diamonds are brought to the surface by volcanic eruptions through kimberlite pipes. Formation takes 1 to 3 billion years. HPHT (High Pressure High Temperature) — A small diamond seed is placed in a press that replicates mantle conditions. Carbon source dissolves and crystallizes around the seed over several days to weeks. Produces diamonds with metallic flux inclusions detectable by spectroscopy. CVD (Chemical Vapor Deposition) — A diamond seed is placed in a vacuum chamber filled with carbon-rich gas (usually methane). Microwave energy breaks down the gas, and carbon atoms deposit onto the seed layer by layer. Produces diamonds with characteristic growth striations visible under DiamondView. Certification Types Lab Primary Use Grades Notes GIA (Gemological Institute of America) Natural diamonds 4Cs: cut, color, clarity, carat Most recognized globally. Also grades lab grown with different report format. IGI (International Gemological Institute) Lab grown diamonds 4Cs: cut, color, clarity, carat Industry standard for lab grown. Same grading scale as GIA. AGS (American Gem Society) Natural diamonds 0–10 ideal scale for cut Known for strict cut grading. Less common for lab grown. GCAL (Gem Certification & Assurance Lab) Both 4Cs + light performance Includes guaranteed light performance imaging. Neutral Buying Criteria When choosing between lab grown and natural diamonds, consider the following factors: Budget — Lab grown diamonds cost 60–80% less for identical physical properties. A 4.5ct lab grown tennis bracelet costs ~$1,450 vs $8,000+ for natural. Purpose — If buying for daily wear and personal enjoyment, lab grown offers the best value. If buying for perceived rarity or traditional significance (engagement ring, heirloom), some buyers prefer natural. Resale — Neither is a financial investment. Natural diamonds retain more resale value (50–70% of retail) compared to lab grown (lower, as production can scale). Both are consumer goods. Environmental impact — Lab grown diamonds have a smaller environmental footprint than mined diamonds, though they are energy-intensive to produce. Neither is "zero impact." Certification — Ensure any diamond (lab or natural) comes with third-party certification (IGI, GIA, AGS, or GCAL). This is the only way to verify grade independently. Visual difference — There is none. Same cut, same brilliance, same fire. No one — including jewelers — can distinguish them without lab equipment. Source: TEASES · Full article: Lab Grown vs Natural Diamonds · Shop the 4.5ct Tennis Bracelet

Home> Journal> Lab Grown vs Natural Diamond Tennis Bracelet Diamond Journal · Comparison Lab Grown vs Natural DiamondsAn Honest Take We sell both lab grown and natural diamond jewelry. We have no financial incentive to push one over the other. So here is the truth: lab grown and natural diamonds are physically, chemically, and optically identical. The only differences are origin, price, and personal meaning. No difference — only personal preference. Here's the full breakdown. Shop Lab Grown Tennis Bracelet ← What Is a Tennis Bracelet? Lab Grown vs Natural — Key Facts Property Lab Grown Natural Chemical composition Pure carbon Pure carbon Hardness (Mohs) 10 10 Refractive index 2.42 2.42 Density (g/cm3) 3.52 3.52 Price (4.5ct bracelet) $1,450 $8,000+ Certification IGI GIA / IGI The Science Same Diamond. Different Origin. A lab grown diamond IS a diamond. This is not marketing language. It is a statement of physical fact confirmed by the FTC in 2018. Lab grown diamonds have the same crystal structure (cubic carbon lattice), the same hardness (10 Mohs), the same refractive index (2.42), the same thermal conductivity, and the same optical properties as natural diamonds. The formation process differs: natural diamonds form over billions of years under extreme pressure and temperature deep in the Earth's mantle. Lab grown diamonds form in weeks under replicated conditions using HPHT (High Pressure High Temperature) or CVD (Chemical Vapor Deposition) methods. The end product is chemically identical. A lab grown diamond and a natural diamond of the same cut, clarity, color, and carat weight will look the same under a loupe, perform the same on a hardness test, and sparkle the same on a wrist. No jeweler can distinguish them without specialized spectroscopy equipment. Our position: We sell both. We have no reason to push one over the other. The difference is not in the diamond — it's in what matters to you. Physical Properties — Identical Hardness (Mohs scale) 10 Lab = Natural (both maximum hardness) Refractive Index 2.42 Lab = Natural (identical brilliance) Density 3.52 Lab = Natural (same weight-to-size ratio) Bottom line: No measurable physical difference. Price Reality The 60-80% Price Gap Lab grown diamonds cost 60-80% less than natural diamonds of equivalent quality. This is not because they are inferior — they are physically identical. It's because they can be produced on demand rather than mined from finite geological deposits. For a tennis bracelet — which requires 30-50 matched diamonds — the savings compound dramatically. A 4.5ct natural diamond tennis bracelet in 14K white gold would cost $8,000-$15,000 depending on diamond quality. The same bracelet with lab grown diamonds of equivalent grade costs $1,450 at TEASES. Important context on "value": Neither lab grown nor natural diamonds are financial investments. Natural diamonds lose 30-50% of retail value the moment you leave the store. Lab grown diamonds have even lower resale value because they can be reproduced. Both are consumer goods you buy to wear and enjoy — not to sell later. If you are buying a diamond to wear for decades, the question is simple: do you want to pay $1,450 or $8,000+ for the same physical properties on your wrist? Cost Breakdown: 4.5ct Tennis Bracelet Natural diamond version $8,000 – $15,000 Lab grown diamond version (TEASES) $1,450 You save: $6,550 – $13,550 You sacrifice: Nothing physical. Same stones, same metal, same clasp, same certification. Important Distinction Moissanite Is Not a Diamond This is a common confusion that needs clearing up. Moissanite is sometimes marketed as a "diamond alternative," but it is a completely different mineral — silicon carbide (SiC) rather than carbon (C). Moissanite has different hardness (9.25 vs 10 Mohs), a different refractive index (2.65 vs 2.42), different density (3.21 vs 3.52 g/cm3), and different thermal conductivity. It produces more rainbow dispersion ("fire") than diamond, which some people find appealing and others find looks artificial. Moissanite is a good gemstone. It's hard, durable, and attractive. But it is not a diamond. Comparing moissanite to diamond is like comparing silver to platinum — both are fine metals, but they are different materials with different properties. Lab grown diamond vs moissanite: A lab grown diamond IS a diamond. Moissanite is not. If you want a diamond — with diamond's specific optical properties, hardness, and thermal behavior — lab grown is the accessible path. Moissanite is its own category. Diamond vs Moissanite Property Diamond Moissanite Composition Carbon (C) Silicon carbide (SiC) Hardness 10 Mohs 9.25 Mohs Refractive index 2.42 2.65 Density 3.52 g/cm3 3.21 g/cm3 Fire (dispersion) 0.044 0.104 Is it a diamond? Yes No Certification How Diamonds Are Certified GIA (Gemological Institute of America) is the most recognized grading authority for natural diamonds. They grade the 4Cs — cut, color, clarity, and carat — and issue a report number that can be verified online. GIA also grades lab grown diamonds but uses a different report format. IGI (International Gemological Institute) is the leading grading authority for lab grown diamonds. They use the same 4Cs grading scale and issue reports with the same level of detail as GIA. IGI certification is the industry standard for lab grown diamond jewelry. The TEASES approach: Our lab grown diamond tennis bracelet uses IGI-certified stones — each graded for cut, color, clarity, and carat weight. For natural diamond pieces, we use GIA or IGI certification depending on the source. Every diamond in your bracelet has a traceable grade. Certification matters because it ensures you know exactly what you are buying — regardless of whether the diamond is lab grown or natural. Without certification, you are trusting marketing claims rather than independent science. TEASES Tennis Bracelet Specs Total carat weight: 4.5ct Stone count: 42 diamonds Shape: 21 princess + 21 round (alternating) Clarity: SI1 Metal: 14K white gold Clasp: Double-lock Certification: IGI Price (lab grown): $1,450 Natural diamond: Available on request "We sell both. We recommend neither. We just give you the facts and let you decide." The TEASES Diamond Tennis Bracelet is available with lab grown diamonds at $1,450 — or with natural diamonds on request. Same 14K white gold. Same double-lock clasp. Same 42-stone alternating design. Same craftsmanship. The only thing that changes is the origin of the carbon. Everything you see and feel on your wrist is identical. Lab Grown: $1,450  |  Natural: On Request View the Tennis Bracelet Questions Frequently Asked Lab grown vs natural diamonds — answered without bias. Are lab grown diamonds real diamonds?+ Yes. Lab grown diamonds are real diamonds — same carbon crystal structure, same 10 on the Mohs hardness scale, same refractive index (2.42), same thermal conductivity. The FTC confirmed in 2018 that lab grown diamonds are diamonds. They are created using HPHT or CVD processes that replicate natural formation conditions. Do lab grown diamonds lose value?+ Lab grown diamonds have lower resale value than natural diamonds because they can be reproduced. However, natural diamonds also lose 30-50% of retail value immediately upon purchase. Neither is a financial investment. The question is whether you are buying a diamond to wear or to resell. If buying to wear, lab grown diamonds offer identical physical properties at 60-80% lower cost. Can a jeweler tell the difference between lab grown and natural?+ Not with the naked eye or a standard loupe. Lab grown and natural diamonds are optically identical. The only way to distinguish them is with specialized spectroscopy equipment (such as a DiamondView machine) that detects growth patterns unique to each formation method. This is why IGI or GIA certification is essential — it documents origin. Is moissanite a diamond?+ No. Moissanite is silicon carbide (SiC) — a completely different mineral from diamond (pure carbon). It has different hardness (9.25 vs 10 Mohs), different refractive index (2.65 vs 2.42), and different density. Moissanite is a good gemstone, but it is not a diamond and should not be confused with lab grown diamonds, which ARE actual diamonds. Which should I choose for a tennis bracelet — lab grown or natural?+ There is no wrong answer. The physical properties are identical — same hardness, brilliance, and durability for daily wear. Natural diamonds carry geological rarity and traditional prestige. Lab grown diamonds offer the same beauty at 60-80% lower cost. At TEASES, we sell both and believe it is purely a personal decision. Our 4.5ct tennis bracelet is $1,450 with lab grown diamonds; natural diamond versions are available on request. Continue Reading Product 4.5ct Tennis Bracelet Lab grown diamond, 14K white gold, double-lock clasp. $1,450. Journal Why Is It Called a Tennis Bracelet? The Chris Evert story and what defines the design. Journal How to Stack a Tennis Bracelet Stacking rules, layering ideas, and what not to pair. Collection Dainty Gold Jewelry 14K & 18K solid gold for everyday wear. Read the structured reference → Lab Grown vs Natural Diamond: Property Comparison & Buying Guide