Do gemstones increase in value over time?

Are gemstones an investment?

Do you own an antique ring set with a ruby, a pendant with an emerald, or a diamond passed down from a loved one? Many owners wonder if these stones have increased in value over the years.

The answer is not so straightforward: while some gemstones can indeed increase in value over time, this is not always the case.

Their value depends on many factors, such as their rarity, quality, origin, and market trends.

In this article, find out why some gemstones become true treasures while others retain a more stable value.

Not all gemstones change in the same way

Unlike gold, whose price is set daily on international markets, gemstones do not have a single official price.

Every stone is different.

Two rubies of the same weight can have very different values depending on their color, clarity, or origin.

That is why it is impossible to say that all gemstones increase in value over time.

Scarcity plays a key role

As with many collectibles, rarity has a significant impact on the value of a gemstone.

High-quality deposits are limited, and some historic mines are now producing much less than they used to.

This rarity can drive up the value of certain exceptional stones.

High-quality natural rubies, Colombian emeralds, and certain Kashmir sapphires are among the gemstones most sought after by collectors.

Quality remains the most important criterion

Not all gemstones are created equal.

In particular, professionals analyze:

• color;
• purity;
• carat weight;
• the quality of the cut;
• the possible presence of treatments;
• the origin, when it can be determined.

An exceptional gemstone will generally retain its value better than one with many flaws.

Do diamonds always increase in value?

That's a common misconception.

Not all diamonds automatically increase in value.

The market is constantly changing, and several factors influence diamond prices, including the quality of the stone, demand, and the emergence of lab-grown diamonds.

However, the rarest natural diamonds continue to be highly sought after, especially when accompanied by a certificate issued by a recognized laboratory.

What about rubies, sapphires, and emeralds?

Very high-quality rubies, sapphires, and emeralds may increase in value over time, particularly as their rarity increases.

Collectors are particularly interested in:

• natural rubies with an intense red color;
• sapphires with deep, uniform colors;
• emeralds with an intense, luminous green color.

Conversely, a stone of average quality or one that has been heavily treated will not necessarily change in the same way.

Do treatments affect value?

Yes.

Some gemstones are heated or treated to enhance their appearance.

These treatments are common in the jewelry industry and do not mean that a stone is fake.

On the other hand, untreated natural stones are often rarer and may be more sought after on the market.

Can a certificate increase the value of a gemstone?

A certificate does not alter a gemstone's intrinsic quality, but it serves to attest to its characteristics.

When issued by a recognized gemological laboratory, it provides valuable information regarding:

• identifying the stone;
• its weight;
• its dimensions;
• any treatments they may be receiving;
• its origin, when it can be determined.

It therefore provides reassurance to buyers and often makes it easier to appraise the property.

Is there a way to tell if a gemstone has increased in value?

The only way to determine this is to have an expert assessment conducted.

Over the years, the market has evolved, as have our understanding of certain gemstones and collectors' expectations.

An appraisal makes it possible to precisely identify the gemstone, assess its quality, and determine its value based on current market conditions.

Have your gemstone jewelry appraised

Do you own a ring, wedding band, pendant, or bracelet set with a diamond, ruby, sapphire, or emerald?

The experts at Agence de l’Or welcome you to our offices in:

• Braine-l'Alleud
• Wavre
• Wavre Center
• Saint-Pierre-Woluwe
• Rixensart
• La Louvière
• Charleroi
• Uccle

We provide a free, transparent, and no-obligation appraisal of your gold jewelry, as well as the gemstones it contains, when those gemstones are of particular interest.