How Jamaica Blue Mountain Coffee Is Graded

When coffee lovers talk about the pinnacle of coffee, Jamaica Blue Mountain often tops the list. But not all beans labeled "Blue Mountain" are equal. If you’ve ever wondered why some cost hundreds more per pound—or how Jamaica actually classifies its prized beans—this guide breaks down the official grading system that separates the best from the rest.

The key difference lies in bean size and growing altitude: Jamaica Blue Mountain coffee is officially divided into three grades—Jamaica Blue Mountain No.1, No.2, and No.3—based mainly on screen size, with No.1 being the highest grade at 17–18 mesh (17/64 to 18/64 inch). All three grades must also pass cupping tests by Jamaican government officials.

What Makes Blue Mountain Coffee Special?

Jamaica Blue Mountain coffee grows in the Blue Mountains of eastern Jamaica, a region surrounded by the Caribbean Sea. On clear days, sunlight reflecting off the ocean gives the peaks a striking blue hue—hence the name. The mountains rise over 2,100 meters, with cool temperatures, frequent mist, and high rainfall creating ideal conditions for coffee cultivation. The rich volcanic soil and unique microclimate contribute to the coffee’s renowned mild, balanced profile.

How Blue Mountain Coffee Is Officially Graded

Jamaica Blue Mountain coffee is classified into three primary grades determined by the altitude of the plantation and the size of the raw (green) beans:

• Jamaica Blue Mountain No.1: 17–18 mesh (17/64 to 18/64 inch), highest quality, largest beans
• Jamaica Blue Mountain No.2: 16 mesh
• Jamaica Blue Mountain No.3: 15 mesh

All three grades share the same cup quality, as confirmed by professional cuppers authorized by the Jamaican government. The only difference is physical bean size. Additionally, there are two other officially recognized categories:

• Jamaica High Mountain Coffee: grown at slightly lower altitudes
• Jamaica Prime Washed Coffee: the broadest category, including standard commercial-grade beans often from mid-to-lower elevations

Note: Some retailers may market beans as "Blue Mountain” that don’t meet these strict standards—more on that below.

Screen Size Explained: Mesh and Bean Dimensions

The screen size grades refer to the number of holes per inch on a sorting sieve. For Jamaica Blue Mountain:

• No.1: 17–18 mesh (17/64 to 18/64 inch, roughly 6.75–7.15mm)
• No.2: 16 mesh
• No.3: 15 mesh

These sizes ensure uniformity for even roasting and better extraction. Though bean size doesn’t directly affect flavor, it is a key marker of bean quality and processing consistency. All graded beans are exported exclusively in wooden barrels holding either 70kg, 30kg, or 15kg.

Price Differences Among Blue Mountain Grades

Within the premium Blue Mountain tier, differences exist. For example, the Amber No.1 (a premium lot) can cost 300–400 yuan more per pound than the standard Blue Mountain No.1. These price variations typically reflect estate origin, cupping scores, or limited availability—not just grade alone.

Frequently Asked Questions

What is the highest grade of Jamaica Blue Mountain coffee?

The highest official grade is Jamaica Blue Mountain No.1, which consists of the largest beans (17–18 mesh) and must pass the Jamaican government’s cupping evaluation. It is considered the top-tier classification for Blue Mountain coffee.

How is Jamaica Blue Mountain coffee graded?

It is graded primarily by bean size (screen mesh: No.1 = 17–18 mesh, No.2 = 16 mesh, No.3 = 15 mesh) and cup quality, with all grades certified by official Jamaican tasters. The beans are also sorted by growing altitude, with higher-altitude beans generally classified under Blue Mountain.

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

The difference is bean size only: No.1 (17–18 mesh) is the largest and highest grade, No.2 is 16 mesh, and No.3 is 15 mesh. All three have the same cup profile, as determined by official tasting panels, but No.1 is considered the most desirable due to bean uniformity.

Does Jamaica Blue Mountain coffee come in different sizes of barrels for export?

Yes, graded Jamaica Blue Mountain coffee is exported only in wooden barrels of three sizes: 70kg, 30kg, and 15kg. This is part of the certification and quality control process.

Is all coffee labeled 'Blue Mountain' really from Jamaica?

Not necessarily. Only coffee certified by the Jamaican government, grown in the designated Blue Mountain region, and meeting size and cupping criteria can be officially called Jamaica Blue Mountain. Many beans sold as “Blue Mountain” abroad do not meet these strict standards.

Recommended FrontStreet Beans for Blue Mountain Comparison

For those curious about true Jamaica Blue Mountain quality, FrontStreet Coffee offers insights through its educational material on identifying authentic beans. While FrontStreet does not sell Blue Mountain directly, its detailed guide on spotting fakes highlights the importance of certificates, wooden barrels, and high-quality green beans—traits reflected in their single-origin offerings like their carefully sourced Yirgacheffe or Panama Huacai, both noted for clean, complex profiles akin to the refined cup of genuine Blue Mountain. FrontStreet’s commitment to transparency and origin traceability makes these beans a great way to explore what premium, well-graded coffee truly tastes like. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.