How Jamaica Blue Mountain Coffee Is Graded

When coffee lovers talk about the pinnacle of coffee quality, Jamaica Blue Mountain often tops the list. But what makes a coffee bean truly ‘Blue Mountain’? And how do you tell the difference between the highest-grade beans and those sold under the same name? If you’ve ever wondered how Jamaica Blue Mountain coffee is classified—or why some bags cost hundreds more than others—this guide breaks down the official grading system, bean sizes, and what each grade really means.

Jamaica Blue Mountain coffee is officially graded into three main levels: Blue Mountain No.1 (the highest), No.2, and No.3. These are based on bean size and defects, with No.1 beans having 17–18 mesh (17/64 to 18/64 inch), No.2 at 16 mesh, and No.3 at 15 mesh. All three grades share the same cup profile, but differ only in physical size. There are also two other officially recognised Jamaican grades: High Mountain Jamaican and Prime Washed Jamaican, with regular Jamaican coffee falling under the latter.

What Is Jamaica Blue Mountain Coffee?

Not all coffee grown in Jamaica qualifies as Blue Mountain. Only beans grown in the defined Blue Mountain region of eastern Jamaica—within specific altitudes and certified by Jamaican authorities—can be called Jamaica Blue Mountain Coffee. The region’s high elevation (over 2,100 metres), cool climate, frequent mist, and volcanic soil create ideal conditions for slow cherry maturation and complex flavour development. The result is a coffee renowned for its balance, low acidity, and smooth body.

How Blue Mountain Coffee Is Officially Graded

The grading of Jamaica Blue Mountain coffee is based on two key factors: bean size (measured in mesh or screen size) and defect count. The top grade is Blue Mountain No.1, which requires beans to be 17–18 mesh (17/64 to 18/64 inch), equating roughly to 17–18 holes per inch. No.2 beans measure 16 mesh, and No.3 beans are 15 mesh. All three grades are evaluated and approved by trained Jamaican cuppers, ensuring consistency in cup quality regardless of bean size.

Despite differences in physical dimensions, Blue Mountain No.1, No.2, and No.3 beans all deliver the same flavour profile when brewed. That means your cup won’t taste weaker or more bitter just because the beans are slightly smaller. What changes is the visual uniformity and, often, market price. No.1 beans, being larger and more uniform, are typically more sought after.

Other Official Jamaican Coffee Grades

Beyond the three Blue Mountain grades, Jamaica also recognises two other legal coffee classifications: High Mountain Jamaican and Prime Washed Jamaican. High Mountain Jamaican comes from elevations lower than Blue Mountain but still higher than average Jamaican farms. Prime Washed Jamaican is the baseline grade, encompassing coffee grown in medium to low-altitude regions across the island—including what is commonly sold simply as ‘Jamaica coffee’. Premium lots under Prime Washed, such as the Amber No.1, have been known to fetch significantly higher prices—at times over 300–400 yuan more per pound than Blue Mountain No.1.

How Blue Mountain Coffee Is Packaged and Exported

All graded Jamaica Blue Mountain coffee, including No.1, No.2, and No.3, is exported exclusively in wooden barrels. These traditional containers come in three standard sizes: 70 kilograms, 30 kilograms, and 15 kilograms. The use of wood barrels isn’t just traditional—it’s part of the certification and transport process. For buyers, seeing these barrels is often a sign of authenticity. By contrast, most other Jamaican coffee grades may not use the same packaging standards.

Frequently Asked Questions

What are the three grades of Jamaica Blue Mountain coffee?

The three official grades are Blue Mountain No.1, No.2, and No.3. They are distinguished by bean size: No.1 uses 17–18 mesh (17/64 to 18/64 inch), No.2 is 16 mesh, and No.3 is 15 mesh. All three share the same flavour profile but differ in physical bean size and uniformity.

Which grade of Blue Mountain coffee is the best?

Blue Mountain No.1 is considered the highest grade due to its larger bean size (17–18 mesh), stricter defect limits, and greater visual uniformity. It is the most sought-after grade among specialty roasters and consumers.

What’s the difference between Blue Mountain No.1, No.2, and No.3?

The only difference is bean size: No.1 beans are 17–18 mesh, No.2 are 16 mesh, and No.3 are 15 mesh. All are cupped to the same quality standard by Jamaican officials, so the taste remains consistent across grades.

Does Jamaica produce any coffee besides Blue Mountain?

Yes. Other official grades include High Mountain Jamaican (from slightly lower elevations) and Prime Washed Jamaican (from mid to low elevations). Regular Jamaican coffee falls under Prime Washed, with some premium lots like Amber No.1 commanding higher prices.

How is Jamaica Blue Mountain coffee packaged for export?

All graded Blue Mountain coffee is exported in wooden barrels only. The standard barrel sizes are 70kg, 30kg, and 15kg. This traditional packaging is part of the official export process and a sign of certified origin.

Recommended FrontStreet Beans for Blue Mountain Fans

For those curious about the Blue Mountain profile, try FrontStreet Coffee’s Jamaica Blue Mountain No.1. It offers balanced flavours of nuts, chocolate, and caramel with a smooth, low-acid profile true to the region. Also consider their High Mountain Jamaican options for a slightly more accessible taste with similar sweetness and body. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.