The World's Rarest Coffee Varieties: Meet the Unusual Beans Behind Some Extraordinary Cups

Most of us are familiar with Arabica and Robusta, the two main types of coffee grown commercially around the world. But did you know that within the coffee family there are hundreds of varieties, each with its own characteristics?

Some are widely grown, while others are cultivated in tiny quantities, prized for their unusual flavours, or simply difficult to grow.

From delicate floral coffees to naturally low-caffeine beans, let's explore some of the most fascinating varieties in the coffee world.

1. Gesha (Geisha): The Famous One

Originally from Ethiopia, Gesha became internationally famous after a Panamanian coffee won the Best of Panama competition in 2004.

Gesha is known for its delicate, tea-like character, often featuring jasmine, bergamot, citrus and tropical fruit notes.

Exceptional lots have sold for extraordinary prices at auction, although Gesha is now grown in several countries and isn't always particularly rare.

2. Laurina (Bourbon Pointu): Naturally Low in Caffeine

Imagine a coffee that's naturally lower in caffeine, without going through the decaffeination process.

That's Laurina, also known as Bourbon Pointu.

This unusual mutation of Bourbon is associated with Réunion Island and is recognised for its relatively low caffeine content.

It can produce delicate, sweet cups with gentle acidity and floral or fruity notes. Its low yields and susceptibility to disease have limited widespread cultivation.

3. Sudan Rume: A Rare Coffee with Wild Roots

Sudan Rume, also called Rume Sudan, originates from the region of present-day South Sudan.

It's an unusual Arabica variety valued for its genetic diversity and potential for exceptional cup quality.

Expect flavours that can include citrus, florals, tropical fruit and delicate tea-like characteristics.

The catch? Sudan Rume can be difficult to cultivate and produces relatively low yields, making it uncommon as a standalone commercial coffee.

4. Wush Wush: The Fruity Surprise

With a name like Wush Wush, this coffee already sounds interesting!

Named after an area in Ethiopia, Wush Wush has also attracted attention among specialty coffee producers in Colombia.

It's particularly associated with complex, fruit-forward flavour profiles. Depending on how it's grown and processed, tasting notes can include berries, tropical fruit and florals.

It's a great example of how an unusual variety and careful processing can produce a memorable cup.

5. Pacamara: The Giant of the Coffee World

Pacamara is hard to miss, thanks to its unusually large beans.

Developed in El Salvador by crossing the Pacas and Maragogype varieties, it combines characteristics of both parents.

Pacamara coffees can be beautifully complex, with flavours ranging from chocolate and caramel to citrus, stone fruit and floral notes.

It's not as rare as some of the others on this list, but exceptional Pacamara lots are highly sought after.

Why Are Some Coffee Varieties So Rare?

Not every unusual coffee variety is suited to large-scale farming. Some produce fewer cherries, require particular growing conditions, or are more vulnerable to pests and disease.

Others are relatively new to commercial cultivation, with only a handful of producers experimenting with them.

And rarity doesn't automatically mean better coffee.

A carefully grown, processed and roasted Bourbon or Caturra can be just as enjoyable as an expensive Gesha. The variety is only one part of the story. Altitude, climate, soil, processing and roasting all contribute to what ends up in your cup.

Would You Taste the Difference?

Absolutely — although perhaps not in the way you'd expect.

Some rare coffees have striking floral aromas, others taste remarkably fruity, and some offer an unusually delicate body.

The best way to explore these differences is to taste coffees side by side, ideally brewed using the same method.

At Mont58, we love the diversity of coffee and the fact that there's always something new to discover. Whether it's an unusual variety or a beautifully balanced everyday coffee, there's a whole world of flavours waiting to be explored.

Because sometimes the most interesting thing about coffee is discovering just how different one cup can be from another.