Simulated Diamonds vs Synthetic Diamonds – Meaning, Guide and Key Differences

Quick Summary

• Simulated diamonds are not real diamonds they only look like diamonds (e.g., cubic zirconia, moissanite).

• Synthetic diamonds (lab-grown diamonds) are real diamonds made in a lab with the same properties as natural diamonds.

• If you want authenticity + durability,  choose synthetic diamonds

• If you want low-cost fashion jewellery,  choose simulants

What Is a Diamond Simulant?

Definition: Diamond Simulant

A diamond simulant is a gemstone designed to imitate the appearance of a real diamond but is made from entirely different materials.Diamond simulants are made from different materials and do not share the same chemical structure as diamonds.

Common Diamond Simulants

• Cubic Zirconia (CZ)

• Moissanite

• White Sapphire

Also read – 

Cubic Zirconia vs. Moissanite – Comparison and Buying Guide 

Lab-Grown Moissanite Vs. Lab-Grown Diamond

Key Characteristics

• Looks like a diamond but not chemically the same

• More affordable than real diamonds

• Used in fashion jewellery

• Lower durability than diamonds

Important: A diamond simulant is not a lab-grown diamond and not a real diamond.

What Are Synthetic Diamonds ? (Lab-Grown Diamonds Explained)

Definition: Synthetic Diamond

A synthetic diamond is a real diamond created in a laboratory using advanced technology. Synthetic diamonds have the same chemical, physical, and optical properties as natural diamonds.

How Synthetic Diamonds Are Made

Synthetic Diamonds are made using the following process:

• HPHT (High Pressure High Temperature)

• CVD (Chemical Vapor Deposition)

These processes replicate how diamonds form naturally underground.

Key Characteristics

• Same chemical composition (carbon)

• Same hardness (10/10 Mohs scale)

• Same brilliance and optical properties

• Certified by labs like GIA / IGI / GCAL

What Is the Difference Between Simulated and Synthetic Diamonds?

A simulated diamond is a material that mimics the appearance of a diamond but does not have the same chemical or physical properties. A synthetic diamond, also known as a lab-grown diamond, is a real diamond created in a laboratory with the same composition, hardness, and brilliance as natural diamonds.

Comparing & Understanding the 3 Types of Diamonds

Natural vs Synthetic vs Simulated Diamonds

Key takeaway:

• Natural + Synthetic = Real diamonds

• Simulated = Diamond lookalikes

Also Read : Differentiate Between Lab Grown vs Natural Diamond 

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Synthetic Diamonds vs Simulated Diamonds (Comparison Table)

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Durability & Lifespan Comparison

Do simulated diamonds last?

They can last for years, but they scratch and lose brilliance over time.

Ethical & Environmental Impact

Why Buyers Prefer Synthetic Diamonds

• No mining required

• Lower environmental impact

• Conflict-free sourcing

• Sustainable alternative

Simulated Diamonds

• Also eco-friendly

• But lack long-term value

Trend Insight:

Modern buyers increasingly prefer lab-grown diamond jewellery for sustainability + authenticity.

Also read – Environmental Impacts Of Diamond Mining

How to Choose Between Simulated and Synthetic Diamonds

Choose Simulated Diamonds If:

• Budget is under 10K

• Jewellery is for short-term or fashion use

• Authenticity is not important

Choose Synthetic Diamonds If:

• You want a real diamond

• Buying for engagement or wedding

• Need durability for daily wear

• Care about sustainability

How to Tell if a Diamond Is Simulated or Synthetic

At-Home Indicators

• Fog test (temporary indicator)

• Weight differences (CZ heavier)

• Sparkle pattern

Professional Verification

• Certification (GIA / IGI)

• Thermal conductivity test

• Expert jeweller evaluation

Best practice: Always ask for a grading certificate.

Best Practices to Buy Synthetic Diamonds

• Understand simulated vs synthetic difference

• Choose reputed lab-grown diamond brands

• Verify certification (GIA / IGI)

• Check cut, clarity, color, carat

• Avoid unclear product labeling

If you’re looking for authentic, sustainable, and high-quality diamonds, explore premium lab-grown diamond and jewellery  collections from Grown Diamond Corporation and make a confident, informed choice.

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