Are Gemstones Sold Online for Just a Few Hundred Baht Really Good?

Gemstones are precious materials formed naturally from minerals or rocks. Today, gemstones are categorized into many types, each with different price ranges.

For example:

Hard gemstones such as ruby and sapphire
Softer gemstones such as emerald and quartz

Natural gemstones are formed by nature and are widely used in jewelry, including necklaces, pendants, rings, earrings, bracelets, and bangles.

Nowadays, we often see gemstone jewelry sold online or on social media at very low prices—sometimes just a few hundred baht. This raises an important question:
Are they genuine gemstones, or are they fake or treated stones being sold deceptively?

Are Online Gemstones Priced in the Hundreds of Baht Really Genuine?

This is because gemstones come in many varieties, and not all of them are rare or highly valued.

Some genuine gemstones that are relatively inexpensive and less popular include:

Garnet
Onyx
Citrine
Amethyst

These gemstones are often softer stones or stones with visible inclusions, less desirable colors, or lower clarity, which makes their market value much lower. As a result, they are commonly sold online at affordable prices.

In general, a genuine gemstone weighing around 1 carat usually starts at approximately 1,000 THB or more, depending on the gemstone type and overall quality.

Rare and high-quality gemstones such as ruby, sapphire, and emerald can range from tens of thousands to millions of baht per piece.

What Kind of Gemstones Are Considered High Quality and Trustworthy?

There are several basic ways to identify whether a gemstone is real. You can observe its weight, clarity, inclusions, or test it under light or heat. However, the most reliable method is to purchase gemstones from a trusted jeweler that provides a gemstone certificate issued by a recognized gemological institute.

Here are some simple guidelines:

Weight:
A genuine gemstone weighing 1 carat equals approximately 200 milligrams.
Clarity and inclusions:
Natural gemstones often contain small inclusions or fine scratches formed naturally. If a gemstone appears perfectly flawless, it may be synthetic or fake.
Inclusion patterns:
Genuine gemstones usually have inclusions that look like fine needles, fingerprints, or rainbow-like patterns of varying sizes.
Fake gemstones often show round air bubbles or curved color bands.
Light reflection:
When viewed under natural light or sunlight, genuine gemstones reflect light unevenly with variations in color tones.
Fake stones often reflect light in a uniform rainbow-like pattern.
Heat resistance:
Genuine gemstones will not melt, deform, or be damaged when exposed to heat. In many cases, the color may even appear more vivid.
If the stone is damaged by heat, it is likely fake.
Gemstone certification:
A reputable gemstone seller should provide a gemstone certificate.
If purchasing second-hand gemstones, ensure the certificate is authentic and not a counterfeit. When in doubt, have it verified by a professional gemologist.

Which Gemstones Are Truly High Quality?

The easiest way to confirm gemstone quality is through a gemstone certificate, which provides detailed information similar to a diamond certificate. This includes:

Carat weight
Cut
Color
Clarity

Additional details may include the gemstone’s origin and any treatments applied.

Reliable gemstone certificates are issued by internationally recognized institutions such as GIT, AIGS, and GCI.

At Petchompoo Jewelry, we offer only genuine gemstones and diamond jewelry of premium quality. Every piece comes with an official certificate from trusted gemological institutes recognized internationally.

We provide: