Lab Grown Gems vs Mined Gemstones: The Complete Buyer's Guide (2026)
Are lab grown gems better than mined gemstones? Which should you buy? And what are you actually paying for?
These are some of the most searched questions in the jewellery world today. As lab grown gems become more popular, many buyers are trying to understand the differences without the marketing hype.
At Gemdrop, we believe both lab grown gems and mined gemstones deserve their place in jewellery. They simply offer different value propositions.
This guide explains the differences, how professionals identify them, how pricing works, and how to choose the right gem for your collection.
Quick Answer
A lab grown gem has the same chemical composition, crystal structure and optical properties as its mined counterpart. The difference is how it formed.
- Lab grown gems are created in controlled laboratory conditions.
- Mined gemstones are formed naturally within the Earth over approximately millions of years.
Both can be beautiful. Both have advantages. The best choice depends entirely on what matters most to you.
What Is a Lab Grown Gem?
A lab grown gem is a crystal that has been grown using scientific processes that recreate the conditions found in nature.
These gems are not glass.
They are not plastic.
They are not "fake."
Instead, they are genuine crystalline materials with the same chemistry as their mined equivalents.
Examples include:
- Lab grown sapphire
- Lab grown ruby
- Lab grown emerald
- Lab grown alexandrite
- Lab grown spinel
- Lab grown diamond
What Is a Mined Gemstone?
A mined gemstone forms naturally inside the Earth.
Heat, pressure, chemistry and geological processes combine over thousands—or often millions—of years to produce crystals.
Every mined gemstone has experienced its own unique geological history, making each one individual.
No two natural gemstones are exactly alike.
This rarity is one of the reasons collectors have treasured them for centuries.
Lab Grown vs Mined: What's the Difference?
| Feature | Lab Grown Gem | Mined Gemstone |
|---|---|---|
| Formation | Laboratory grown | Naturally formed in the Earth |
| Chemical Composition | Same | Same |
| Crystal Structure | Same | Same |
| Optical Properties | Same | Same |
| Rarity | Can be produced repeatedly | Naturally limited |
| Price | Generally much lower | Usually higher |
| Typical Appearance | Often cleaner | Usually contains natural inclusions |
| Environmental Impact | No mining required | Requires mining operations |
The biggest difference is origin, not beauty.
Can You Tell the Difference?
This is one of the biggest misconceptions online.
For many gems, you cannot reliably tell the difference with the naked eye.
Professional gemmologists use specialised equipment including:
- Microscopes
- Refractometers
- Spectroscopes
- UV fluorescence testing
- Polariscopes
- Advanced spectroscopy
- Inclusion analysis
Sometimes a trained gemmologist can identify growth features under magnification.
Examples include:
- Growth lines
- Flux residue
- Inclusions
- Growth structures
- Crystal zoning
Meanwhile, mined gemstones typically display natural crystal growth patterns and inclusions formed during geological processes.
However, modern laboratory-grown gems have become so sophisticated that identification often requires advanced laboratory testing.
Are Lab Grown Gems Real?
This question appears in Google thousands of times every month.
The answer depends entirely on how the word "real" is being used.
Scientifically, lab grown gems are genuine crystals with the same chemistry as mined equivalents.
Commercially, the jewellery industry distinguishes between:
- Lab grown gems
- Mined gemstones
Neither description is "better."
They simply describe origin.
This is why reputable sellers always disclose whether a gem is lab grown or mined.
Transparency builds trust.
Why Are Lab Grown Gems Less Expensive?
Price is driven by rarity.
A mined gemstone may have taken millions of years to form and could be one of very few stones with its exact colour, clarity and size.
A laboratory can grow additional gems using established production methods.
As production increases, availability rises.
Greater availability usually means lower prices.
This allows buyers to own larger, cleaner, more vividly coloured gems for significantly less than comparable mined gemstones.
Why Are Mined Gemstones More Expensive?
Natural rarity is the primary factor.
Other influences include:
- Mining costs
- Exploration
- Cutting losses
- Supply limitations
- Collector demand
- Historical significance
- Geographic origin
Some gemstones become highly valuable because production from famous mines has stopped completely.
Others command premiums because collectors value their unique geological story.
Are Lab Grown Gems Better?
There isn't a universal answer.
If your priorities include:
- Exceptional value
- Larger sizes
- Excellent clarity
- Vibrant colour
- Modern technology
...a lab grown gem may be ideal.
If your priorities include:
- Geological rarity
- Natural formation
- Collectability
- Long-term historical appeal
- Unique natural inclusions
...a mined gemstone may be the better choice.
Both deserve appreciation for different reasons.
Are Mined Gemstones More Beautiful?
Beauty is subjective.
Many buyers actually prefer the clean appearance often found in lab grown gems.
Others love the tiny inclusions and natural characteristics that make each mined gemstone unique.
Some collectors even consider natural inclusions part of a gemstone's personality.
The best gemstone is the one that makes you smile every time you wear it.
How Do Gemmologists Identify Lab Grown Gems?
Despite what social media often claims, there is no single "magic test" that can determine whether a gem is lab grown or mined. Robust identification relies on gathering multiple pieces of evidence before reaching a conclusion.
The process usually happens in two stages:
1. Identify the Gem Species
A gemmologist first confirms what the gem is using standard gemmological tests. These may include:
- Colour – assessing hue, tone and saturation.
- Cut – examining proportions, symmetry and overall craftsmanship.
- Clarity – evaluating inclusions, fractures and other internal features.
- Refractive Index (RI) – measured with a refractometer to identify the gem species.
- Polariscope – used to determine whether a gem is singly or doubly refractive and to assess its optical behaviour.
- Specific Gravity (SG) – measuring density, which helps distinguish between similar gem materials.
- Pleochroism – observing colour changes from different viewing directions using a dichroscope.
- Spectroscope – analysing the absorption spectrum produced by trace elements within the gem.
These tests establish the gem's identity but generally cannot determine whether it is lab grown or mined, as both often share the same chemical composition and optical properties.
2. Determine the Gem's Origin
Once the gem species has been identified, the gemmologist looks for evidence of how it formed.
This may involve examining:
- Growth structures under magnification.
- Natural and synthetic inclusion patterns.
- Curved or angular growth zoning.
- Flux residues or metallic inclusions associated with certain growth methods.
- Hydrothermal growth features.
- Internal strain patterns viewed with polarised light.
- Fluorescence and phosphorescence.
- Trace element chemistry.
- Advanced spectroscopic analysis.
Because modern lab grown gems have become increasingly sophisticated, no single characteristic should be relied upon in isolation. Instead, experienced gemmologists evaluate multiple observations together. In some cases, especially for high-quality modern material, advanced laboratory testing is required to confidently determine whether a gem is lab grown or mined.
Should You Always Buy Certified Gems?
For significant purchases, certification is highly recommended.
A recognised gem laboratory can identify:
- Whether the gem is lab grown or mined
- Any treatments
- Species and variety
- Key gem characteristics
Certification adds confidence for both buyers and future owners.
Buying Tips for Any Gem
Whether you're choosing a lab grown gem or a mined gemstone, always:
- Buy from reputable sellers.
- Expect clear disclosure of origin.
- Ask whether any treatments have been applied.
- Request certification for higher-value purchases.
- Compare colour before comparing size.
- Understand the return policy.
- Be cautious of prices that seem unrealistically low.
Trustworthy retailers are transparent from the beginning.
Common Myths
"Lab grown gems are fake."
False.
They are genuine crystalline materials produced in laboratories.
"You can always spot one with your eyes."
False.
Many cannot be identified visually.
Professional testing is often required.
"Natural gemstones are always flawless."
False.
Most mined gemstones contain inclusions.
These natural characteristics often help identify them.
"Lab grown gems never have inclusions."
False.
Many lab grown gems contain growth features that can actually help identify how they were produced.
"More expensive always means better."
Not necessarily.
Price reflects many factors, including rarity and supply—not simply beauty.
Which Should You Choose?
There is no wrong answer.
Choose a lab grown gem if you value:
- Outstanding colour
- Excellent clarity
- Larger sizes
- Exceptional value
- Modern innovation
Choose a mined gemstone if you value:
- Natural rarity
- Geological history
- Individual character
- Traditional collecting
- Earth's unique creations
Many jewellery enthusiasts enjoy owning both.
Why Gemdrop Offers Both Perspectives
At Gemdrop, we believe jewellery should be built on transparency, education and trust—not confusing marketing language.
Whether you fall in love with a vibrant lab grown sapphire or a one-of-a-kind mined gemstone, understanding the differences helps you buy with confidence.
The most valuable gem isn't simply the rarest or the most expensive.
It's the one whose story, beauty and craftsmanship resonate with you.
Frequently Asked Questions
Are lab grown gems chemically identical to mined gemstones?
In most cases, yes. They share the same chemical composition and crystal structure. The key difference is their origin.
Are lab grown gems worth buying?
Absolutely. They offer exceptional beauty, excellent value and allow buyers to own larger, high-quality gems at a more accessible price.
Why are mined gemstones more expensive?
Their rarity, geological formation, mining costs and collector demand all contribute to higher prices.
Can jewellers tell the difference?
Often yes—but not always with the naked eye. Professional gemmologists use microscopes and advanced testing equipment, and some modern gems require laboratory analysis to determine their origin.
Should I choose lab grown or mined?
Choose the option that aligns with your priorities. If value and appearance matter most, lab grown gems are an excellent choice. If rarity and natural history appeal to you, a mined gemstone may be the better fit.
Final Thoughts
The debate between lab grown gems vs mined gemstones isn't about determining a winner.
It's about understanding two remarkable ways that beautiful crystals come into existence.
One is shaped by the Earth over immense spans of time.
The other is created through human ingenuity and scientific innovation.
Both have their place in modern jewellery.
The best choice is an informed one—and that's exactly what every Gemdrop customer deserves.