Natural vs. Synthetic Gemstones – How to Tell the Difference and What to Choose

An expert guide to understanding gemstone origins, values, and how to make the right decision

The gemstone world is evolving rapidly. Technological advancements now allow laboratories to create stones that are virtually indistinguishable from their natural counterparts — both chemically and visually. But does synthetic mean fake? Are such stones less valuable? How can you tell the difference?

In this guide, Marcin Pal — gemologist, jeweller, and co-owner of Inkluz — explains the differences between natural, synthetic, and imitation gemstones, helping clients choose with confidence and clarity.

1. What is a natural gemstone?

A natural gemstone is a mineral formed through geological processes in the Earth, without human interference in its internal structure. It often contains inclusions, minor imperfections, or colour zoning — all part of its uniqueness and authenticity.

• Examples: sapphire from Sri Lanka, ruby from Myanmar, emerald from Colombia

• Advantages: rarity, uniqueness, historical and collectible value

• Disadvantages: higher cost, often includes visible inclusions

2. What is a synthetic gemstone?

A synthetic gemstone is chemically and physically identical to its natural equivalent — the only difference is its origin: it was grown in a lab rather than deep underground. Technologies include:

• Flame fusion (Verneuil method) – commonly used for rubies and sapphires

• Hydrothermal growth – used for synthetic emeralds

• Czochralski method – for synthetic spinels or garnets

Lab-grown stones can look flawless, with perfect colour and symmetry. They must be clearly labelled as lab-created, synthetic, or man-made in any certification.

“Synthetic doesn’t mean fake. What matters most is transparency. The client has the right to know exactly what they’re buying,” says Marcin Pal of Inkluz.

3. What are imitation gemstones?

An imitation is a look-alike, often made of glass or low-value minerals, that resembles a gemstone in colour or brilliance but is not chemically related.

• Looks like: a ruby

• Actually is: coloured glass or dyed quartz

Imitations should be clearly identified and priced accordingly — but unfortunately, they're sometimes passed off as genuine stones to unknowing buyers.

4. How to tell the difference?

Without laboratory tools, it’s nearly impossible to distinguish natural from synthetic stones with the naked eye.

To protect yourself:

• Always ask for a certificate from a recognised lab (GIA, IGI, HRD, SSEF)

• Make sure the document explicitly states whether the stone is natural, synthetic, treated, or an imitation

• Be cautious with vague descriptions like “genuine gemstone” without proper documentation

5. Which should you choose?

?Natural gemstone:

• Best for clients who value uniqueness, geological origin, or long-term investment

• Higher price, but collectible and often increasing in value

• Ideal for engagement rings or symbolic gifts

?Synthetic gemstone:

• Great for those who want beauty and durability without high cost

• Ethical choice for clients concerned about environmental impact

• Perfect for everyday wear or modern minimalist jewellery

?Imitation:

• Acceptable when appearance is the only priority and price is low

• Never suitable as an investment or meaningful gift

6. How certificates describe gemstone origin

Final Thoughts

Choosing between natural and synthetic gems isn’t about right or wrong — it’s about being informed and intentional. At Inkluz, we provide full transparency, certified documentation, and personalised guidance. With Marcin Pal’s expertise, every choice is an informed one — because real beauty isn’t just about origin, but about meaning and trust.