Untreated vs Treated Gemstones – Differences, Benefits & Buying Guide

Gemstones are prized for their beauty, rarity, spiritual significance, and astrological importance. While purchasing gemstones, many buyers come across terms such as “natural,” “untreated,” “heated,” “enhanced,” or “treated gemstones.” Understanding these terms is important because gemstone treatments can affect a stone’s appearance, value, durability, rarity, and astrological significance.

In the gemstone market, many stones undergo different treatments to improve color, clarity, transparency, or overall appearance. At the same time, untreated gemstones are often considered more valuable and desirable, especially for astrology and investment purposes.

This guide explains the difference between untreated and treated gemstones, common gemstone treatments, their effects, and how to choose the right gemstone.

What Are Untreated Gemstones?

Untreated gemstones are natural stones that have not undergone any artificial enhancement or chemical process to improve their appearance. Their color, clarity, and structure remain in their original natural state as formed inside the Earth.

These gemstones may only be cut and polished for jewelry purposes, but their natural properties remain unchanged.

Characteristics of Untreated Gemstones

• Completely natural appearance
• No artificial color enhancement
• No chemical or heat treatment
• Higher rarity and value
• Preferred for astrology and spiritual use
• Often contain natural inclusions

What Are Treated Gemstones?

Treated gemstones are natural gemstones that have undergone artificial enhancement processes to improve their color, clarity, transparency, durability, or visual appearance.

These treatments are very common in the gemstone industry and may sometimes be permanent or temporary.

Common Reasons for Gemstone Treatments

• Enhancing color brightness
• Improving clarity and transparency
• Reducing visible inclusions
• Increasing market appeal
• Making gemstones look more valuable

Common Types of Gemstone Treatments

1. Heat Treatment

Heat treatment is one of the most common gemstone enhancements. Gemstones are heated at high temperatures to improve their color and clarity.

This treatment is commonly used for:

• Sapphires
• Rubies
• Tanzanite
• Topaz

Effects of Heat Treatment

• Enhances color intensity
• Improves transparency
• Reduces visible inclusions

2. Oil Treatment

Oil treatment is commonly used in emeralds to fill surface-reaching cracks and improve clarity.

Effects of Oil Treatment

• Makes inclusions less visible
• Improves transparency and appearance
• May require maintenance over time

3. Dyeing

Some gemstones are dyed artificially to improve or alter their color.

Commonly dyed stones include:

• Agate
• Coral
• Turquoise
• Quartz varieties

4. Fracture Filling

Glass or resin materials may be used to fill cracks and fractures in gemstones to improve appearance.

This treatment is commonly seen in:

• Rubies
• Diamonds
• Emeralds

5. Irradiation

Radiation treatment is sometimes used to alter gemstone colors permanently.

Common examples include:

• Blue Topaz
• Diamonds
• Quartz

Major Differences Between Untreated & Treated Gemstones

Feature	Untreated Gemstones	Treated Gemstones
Appearance	Natural appearance	Enhanced appearance
Color	Natural color	Improved or altered color
Clarity	Natural inclusions visible	Enhanced clarity
Rarity	More rare	More commonly available
Price	Usually more expensive	Generally more affordable
Astrology Preference	Highly preferred	Less preferred by astrologers
Investment Value	Higher value	Lower resale value

Why Untreated Gemstones Are Preferred in Astrology

According to Vedic astrology, untreated gemstones are believed to carry stronger natural planetary vibrations and spiritual energies because they remain in their original natural state.

Many astrologers prefer untreated gemstones for astrological remedies because treatments may alter the gemstone’s natural energetic properties.

Benefits of Untreated Gemstones in Astrology

• Believed to carry stronger planetary energies
• Preferred for spiritual and astrological remedies
• Considered more natural and authentic
• Higher trust among astrologers and gemstone experts

Advantages of Treated Gemstones

Although untreated gemstones are more valuable and preferred in astrology, treated gemstones also offer certain advantages.

Benefits of Treated Gemstones

• More affordable than untreated stones
• Visually brighter and clearer
• Easily available in the market
• Suitable for jewelry and fashion purposes
• More attractive appearance for some buyers

How to Identify Untreated & Treated Gemstones

It is often difficult for ordinary buyers to identify gemstone treatments without professional testing.

Common Identification Methods

1. Gemstone Certification

Always request certification from a trusted gemological laboratory. A certificate usually mentions whether the gemstone is untreated or treated.

2. Check Inclusions

Untreated gemstones often contain natural inclusions and patterns. Extremely flawless gemstones at low prices may indicate treatments or synthetic origin.

3. Professional Gem Testing

Gemologists use advanced tools such as microscopes and spectroscopy to detect treatments and enhancements.

Are Treated Gemstones Fake?

No. Treated gemstones are usually still natural gemstones unless they are completely synthetic or imitation stones. Treatments simply enhance the gemstone’s appearance.

However, disclosure of treatments is important while purchasing gemstones.

Which Type Is Better?

The choice depends on the purpose:

• For Astrology: Untreated gemstones are generally preferred
• For Investment: Untreated stones usually have better resale value
• For Jewelry: Treated gemstones may offer beauty at lower cost
• For Fashion: Treated stones are widely used and affordable

Tips for Buying Genuine Gemstones

• Buy from trusted gemstone sellers
• Ask for laboratory certification
• Understand treatment disclosures clearly
• Avoid unrealistically cheap gemstones
• Consult an astrologer before buying astrological gemstones
• Prefer untreated stones for spiritual or astrological use

Untreated and treated gemstones differ mainly in terms of natural condition, appearance, rarity, value, and astrological significance.

Untreated gemstones remain in their original natural state and are usually preferred for astrology, spiritual remedies, and investment purposes because of their rarity and believed energetic properties.

Treated gemstones are natural stones enhanced to improve appearance and affordability, making them popular for jewelry and fashion use.

Before purchasing any gemstone, it is important to understand its origin, treatment status, certification, and intended purpose to make an informed decision.