Gemstones don't follow a quick stock market pattern.
They develop slowly, but steadily.

The strongest price increases of the last decades:

• Spinel ~10% p.a. over the last 10 years

Long underestimated, today extremely in demand worldwide
Vivid / Intense Red & Neon Pink → outstanding value development
Mahenge Spinel as a special feature → outstanding value development

• Ruby ~8% p.a. over the last 10 years

Especially Burma (Mogok) has steadily increased in value for decades. The prices for high-quality rubies are now astronomically high and no longer affordable for the majority.

• Sapphire ~5% p.a. over the last 10 years

Unheated Blue & Padparadscha → clear price increases.
Parti and Teal Sapphires have shown significant value development in recent years

• Emerald ~5% p.a. over the last 10 years

Colombia and Zambia are established and therefore extremely stable in value
Nigeria is a shooting star with high growth potential
Afghanistan also supplies emeralds with high potential

• Paraiba Tourmaline ~10% p.a. over the last 10 years

Explosive development due to extreme rarity (especially Neon Blue)