Gemstones

Last updated: 03.05.2026
Published: 03.05.2026
Author: Marta Kłosowska

Gemstones are more than just jewelry – they are history, emotions, and real value. If you're wondering which gemstone to choose, how much a ruby, emerald, or sapphire costs, and whether tanzanite is an investment opportunity – I'll show you practically, with real examples.

what is a gemstone and how it is formed

how much do ruby, emerald, and sapphire really cost

is tanzanite an undervalued investment hit

differences between natural and lab-created stones

what real valuation looks like and where we overpay

how to make purchasing decisions without risk

Table of Contents

Gemstone – what is it and how is it formed?

Ruby – which one to choose and why is its price so high?

Emerald – what affects its value and how to assess it?

Sapphire – is it the best choice for jewelry?

Tanzanite – is it really an investment opportunity?

Gemstone – what is it and how is it formed?

A gemstone is a natural or laboratory-created mineral of high hardness and rarity, and the way it is formed directly influences its price and investment value – and if you want to buy consciously, you need to understand this now!

From my experience… the biggest mistake investors make is not understanding what they are actually buying. In practice, it looks like someone sees a beautiful stone and assumes that because it sparkles, it must be valuable. Unfortunately, the market works completely differently.

Natural gemstones are formed over millions of years. High pressure, temperature, appropriate geological conditions – all this makes them rare. And rarity = price.

Lab-created stones, on the other hand, are produced under controlled conditions. Chemically, they are identical, but… they do not have the same market value. Why? Because they can be produced.

Example client situation:
A client from Katowice bought a lab-created diamond for PLN 6,000, thinking it would "gain in value." After a year, its real market value was… about PLN 2,500.

👉 Therefore, if you have a budget > PLN 10,000 and are thinking about investment – I recommend only natural stones.

👉 Check current prices at Diament Expert – the lowest in Poland and only with us, a guarantee of the lowest price and return.

Ruby – which one to choose and why is its price so high?

Ruby is one of the most expensive gemstones, and its value depends mainly on the intensity of its red color and its origin – the best specimens can cost more than diamonds, so the choice must be very conscious!

From my experience… a ruby is a stone bought with the heart but sold with the head.

This fancy color is rare because it comes from chromium and occurs only under very specific geological conditions. The most prized rubies are from Burma.

Example stone:

Ruby 1 ct, "pigeon blood" color, untreated – PLN 40,000

Ruby 1 ct, heated – PLN 12,000

Clients most often ask: "is treatment a problem?"
No. But it affects the price.

The biggest mistake investors make is buying a ruby without a certificate.

👉 If you have a budget > PLN 20,000, I recommend looking for untreated rubies – these have investment potential.

👉 Check available stones at Diament Expert – we select only the best pieces.

Emerald – what affects its value and how to assess it?

Emerald is a gemstone whose value depends on its color and inclusions, and interestingly – unlike diamonds, small imperfections can increase its authenticity and value!

In practice, it looks like this: a perfectly clear emerald… raises suspicion.

From my experience, clients often think that "cleaner = better." But with emeralds, it's the opposite.

Example valuation:

Emerald 1 ct, natural inclusions – PLN 8,000

Emerald 1 ct, perfectly clear (synthetic) – PLN 2,500

Emeralds are often oiled – this is a standard practice to improve their appearance.

The biggest mistake investors make is buying "perfect" emeralds without knowledge.

👉 If you care about value – choose natural stones with a certificate.

👉 See Diament Expert's offer – guarantee of authenticity and best prices.

Sapphire – is it the best choice for jewelry?

Sapphire is one of the most versatile gemstones, which, thanks to its hardness and variety of colors, works great in jewelry – and with the right choice, it can also be a good investment!

From my experience… if someone buys their first gemstone – they often end up with a sapphire.

Why? Because it's durable. It has a hardness of 9 on the Mohs scale. It's suitable for everyday wear.

Sapphires come in many colors, but blue is the most well-known.

Example:

Sapphire 1 ct, Ceylon – PLN 6,000 – 15,000

Sapphire 1 ct, Madagascar – PLN 3,000 – 8,000

Clients most often ask: "is every sapphire blue?"
No – there are also pink, yellow, and even colorless ones.

👉 If you have a budget of PLN 5,000 – 10,000 – this is one of the best choices.

👉 Check current jewelry models with sapphires at Diament Expert.

Tanzanite – is it really an investment opportunity?

Tanzanite is a rare gemstone mined in only one place in the world, and its limited availability makes it one of the most interesting investment opportunities – but only if you buy it consciously!

From my experience… tanzanite is undervalued. And that's often where the biggest opportunities arise.

This stone is found only in Tanzania. And the deposits are running out.

Example of a specific stone:

Tanzanite 2 ct, deep blue-violet – PLN 4,500

This is a relatively low price for such a rare stone.

Clients most often ask: "why is it cheaper than sapphire?"
Because the market hasn't priced it yet.

The biggest mistake investors make is ignoring new trends.

👉 If you have a budget of PLN 3,000 – 10,000 – it's definitely worth considering.

👉 Check available tanzanites at Diament Expert – only verified stones and the lowest prices on the market.

Summary

Today, gemstones are more than just decorative accessories – they represent real value, emotions, and a conscious choice. From my experience, a good stone should combine authenticity, origin, and potential – whether it's a ruby, emerald, or sapphire. Each such mineral has its own history and unique hardness, often above 7 on the scale, and for the best specimens, even above 7 on the Mohs scale.

In practice, clients today are looking not only for beauty but also for value – which is why both natural stones and semi-precious stones such as amethyst, agate, aquamarine, citrine, labradorite, or hematite are gaining popularity. Each such crystal can serve not only a decorative role – it is often treated as an amulet, which, according to many, influences energy, vibrations, and even helps to cleanse space.

Looking more broadly, the world of minerals and gemstones offers immense diversity – from diamonds to pearls, from tourmalines to rock crystal. It is these minerals and gemstones that create a market that combines jewelry, investment, and collecting passion. In jewelry – be it a necklace, bracelet, or pendant – a well-chosen stone can completely change the perception of the product and give it a precious character.

The biggest mistake investors make is a lack of knowledge and buying "by eye." That's why I always repeat: the choice of stones must be conscious. What matters is not only the appearance but also the deposit, the processing method (e.g., cabochon vs. faceted cut), authenticity, and the source of purchase. A good supplier and a verified online store or mineral shop are the foundation of security.

Today, precious and ornamental stones, as well as precious and semi-precious stones, are not just about beautiful color and design – they are also an investment and a lifestyle. If you are interested in the most beautiful stones, gemstones, or precious stones, remember: the best opportunities come to those who know what they are looking for.

👉 Therefore, if you want to buy a reliable stone, checked for jewelry quality and price – choose Diament Expert. The lowest prices, no risk, and with a return guarantee.