The grade of blue mountain coffee, how to divide the grade of blue mountain coffee? How do you classify blue mountain coffee? Blue

When coffee lovers talk about the pinnacle of coffee quality, Jamaican Blue Mountain often tops the list. But with its premium reputation comes confusion—how is it really graded, and what makes one Blue Mountain coffee worth hundreds more per pound than another? If you’ve ever wondered how Jamaica categorizes its most famous export, here’s the straight story on what defines each official grade.

Jamaican Blue Mountain coffee is divided into three official grades based on bean size and growing altitude: Blue Mountain No.1, No.2, and No.3. The top grade, No.1, uses only 17–18 mesh (17/64 to 18/64 inch) sized beans, which must also pass sensory evaluation by Jamaican government-approved cuppers. That’s the key difference that justifies its higher price.

What Makes Blue Mountain Coffee Special?

Jamaican Blue Mountain coffee grows in the Blue Mountains of eastern Jamaica, a region defined by its elevation—over 2,100 metres—and cool, cloudy, rainy climate. The combination of high altitude, frequent mist, and rich volcanic soil creates ideal conditions for slow cherry maturation, leading to a cup known for its mild, clean, and balanced profile. The mountains’ unique microclimate is part of why this coffee commands such a prestigious reputation globally.

How Are the Blue Mountain Grades Defined?

The Jamaican Coffee Industry Board officially classifies Blue Mountain coffee into three primary grades:

• Blue Mountain No.1: 17–18 mesh (17/64 to 18/64 inch) beans; highest quality, used for premium single-origin offerings.
• Blue Mountain No.2: 16 mesh beans.
• Blue Mountain No.3: 15 mesh beans.

All three grades are evaluated for cup quality by certified Jamaican tasters, ensuring consistency. Importantly, these beans are only exported in wooden barrels holding either 70 kg, 30 kg, or 15 kg, preserving freshness and traceability.

There’s also a fourth, lower category: Prime Washed Jamaican, which includes regular Jamaican coffees grown at medium and lower altitudes. Within the premium Blue Mountain range, some single-estate lots—like those labelled “Amber No.1”—can cost $300–400 more per pound than standard Blue Mountain No.1 beans, reflecting origin prestige or estate-specific processing.

What Does Mesh Size Mean in Coffee Grading?

Mesh size refers to the number of holes per inch in a sieve, and in Jamaica’s coffee grading system, it determines bean size. For Blue Mountain:

• No.1: 17–18 mesh (beans must be larger)
• No.2: 16 mesh
• No.3: 15 mesh

Larger beans often correlate with better uniformity and development during roasting, though all three grades are equally balanced in taste—assuming they pass the official cupping test. Mesh size is just one part of the grading criteria, with sensory evaluation being equally critical.

How Is Blue Mountain Coffee Exported?

All certified Jamaican Blue Mountain coffee, regardless of grade, must be exported in wooden barrels. These barrels come in three standard sizes:

• 70 kilograms
• 30 kilograms
• 15 kilograms

The use of wood barrels helps preserve the beans’ freshness and moisture during transport. Each barrel is also labeled with detailed batch information, making it easier to trace the coffee back to its estate and harvest year—an important factor for importers and roasters verifying authenticity.

Frequently Asked Questions

What are the three official grades of Jamaican Blue Mountain coffee?

The three official grades are Blue Mountain No.1, No.2, and No.3. They are classified primarily by bean size: No.1 uses 17–18 mesh beans, No.2 uses 16 mesh, and No.3 uses 15 mesh. All must pass sensory evaluation by Jamaican government cuppers.

Which Blue Mountain grade is the highest quality?

Blue Mountain No.1 is the highest quality grade. It consists of the largest beans (17–18 mesh) and is subject to the same rigorous cupping standards as other grades, ensuring a consistent, premium cup profile.

What is the difference between Blue Mountain No.1 and other grades?

The main difference is bean size and sometimes origin estate. No.1 uses 17–18 mesh beans, while No.2 uses 16 mesh and No.3 uses 15 mesh. No.1 is widely considered the most desirable for its uniformity and is often sourced from prestigious estates.

Why is Blue Mountain coffee exported in wooden barrels?

Jamaican law requires all Blue Mountain coffee to be exported in wood barrels (70 kg, 30 kg, or 15 kg) to preserve freshness, prevent contamination, and allow for batch traceability. The barrels include details about origin and processing.

Is there a price difference between Blue Mountain grades?

Yes. Blue Mountain No.1 typically costs more than No.2 or No.3. Certain single-estate No.1 lots, such as Amber No.1, can cost $300–400 more per pound than standard No.1 beans due to estate reputation or limited availability.

Does mesh size affect the taste of Blue Mountain coffee?

Mesh size mainly affects bean uniformity and roast development. All three Blue Mountain grades are cupped to the same quality standard, so taste should be consistent if the beans are properly roasted—but larger beans (No.1) are often preferred for their visual and roasting consistency.

Recommended FrontStreet Coffee for Blue Mountain Fans

For those curious about authentic Blue Mountain profiles, try FrontStreet Coffee’s Jamaica Blue Mountain No.1, sourced from the historic Clifton Estate at around 1,310 metres. It offers a clean, sweet, and well-balanced cup with notes of chocolate and mild fruit, reflecting the terroir of Jamaica’s high elevations. FrontStreet also provides educational resources on identifying genuine Blue Mountain beans, including certificate checks and barrel details. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.