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Peaberry Sorting and Grading

How peaberries are separated from flat beans, and how they are classified in major origin grading systems

Peaberry Coffee | Green Coffee Grading | Green Coffee Regional Grades

Why Peaberries Need Separate Sorting

Because peaberries are round rather than flat, they cannot be reliably sorted alongside standard flat beans. They pass through screens differently, can stall gravity tables, and behave inconsistently on standard sorting equipment. Mixing peaberry and flat-bean lots also creates calibration problems at the roaster. Separate sorting is therefore both a quality and a logistics requirement.

Sorting Methods

Hand Sorting

  • Most common method, especially for smallholder and artisan production
  • Labour-intensive but produces the cleanest separation
  • Trained sorters identify the rounded shape by touch and sight
  • Premium paid to farmers and processors who provide clean peaberry lots
  • Still the standard at most East African cooperatives and estates

Mechanical Sorting

  • Specialised destoners and gravity tables can separate peaberries
  • Optical sorters (modern facilities) can identify shape differences
  • Still often combined with hand-sorting for high-grade lots
  • Requires a separate processing run — peaberries mixed with flat beans create calibration problems
  • More common at larger estate operations and export-focused facilities

Grading Systems by Origin

Peaberries are given their own grade designation in most major systems:

Origin Peaberry Grade Notes
Tanzania PB Premium grade; separate auction lot
Kenya PB Separate grade; less prominent than AA
Hawaii (Kona) Peaberry Separate and premium designation
Colombia Caracol Regional and farm-level designation
Brazil Moca (or Mocha) Less commonly marketed in specialty trade
Ethiopia Occasional PB designation Not systematically graded

Tanzania

Tanzania has the most developed peaberry grading and marketing infrastructure of any origin. PB lots are separated at washing stations, traded at the Moshi auction as discrete lots, and exported under the internationally recognised "Kilimanjaro Peaberry" designation.

Kenya

Kenya grades peaberry separately as PB but does not promote it as prominently as Tanzania. Most specialty buyers are familiar with Kenyan PB; it tends to be evaluated on its own merits rather than under a branded regional name.

Hawaii (Kona)

Kona Peaberry is one of Hawaii's highest commercial designations. Very limited supply and strong domestic and export demand drive significant premiums — among the highest for any peaberry globally.

Colombia (Caracol)

"Caracol" (Spanish for snail) describes the shape. Not systematically sorted across all regions, but some cooperatives and farms in Huila, Nariño, and Cauca offer caracol lots to specialty buyers.

Ethiopia

Peaberries occur throughout all Ethiopian growing regions but are not routinely sorted or graded separately. Some specialty exporters have begun offering peaberry lots from Yirgacheffe and Guji as the specialty trade matures.

Grading Nuance

Peaberries are typically smaller than the flat-bean equivalent from the same origin. A standard screen-sorting system would classify them at a lower grade based on size alone — which is why a separate PB grade exists. The PB designation exists not as a size grade but as a shape-based classification, acknowledging that standard size grades do not apply.

This means a PB grade does not indicate a larger or more premium bean in the size sense — it indicates a separately sorted, shape-selected lot with its own quality assessment.

Tags: #peaberry #grading #green-coffee #sorting #quality

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