21.00 ct Ceylon Natural Unheated Pyrope Red Garnet Rough from Kolonna, Sri Lanka – Large Facet Grade Rough

Stone Identity & Quality

This is a 21.00 ct Ceylon Natural Unheated Pyrope Red Garnet rough measuring 20.6 × 14.5 × 10.2 mm. It was sourced from Kolonna village around mining in Sri Lanka, within Sabaragamuwa Province.

The stone is presented as facet-grade natural rough and is slightly included. Its considerable size and 10.2 mm depth provide useful material for professional cutting evaluation. The garnet is unheated and retains the natural external and internal characteristics of the rough material.

Color & Visual Characteristics

The garnet displays a rich pyrope-red body color. Under natural sunlight, the rough can appear deeper red to purplish-red in thicker areas, while transmitted illumination reveals much brighter red and reddish-orange light through more transparent sections.

These lighting observations are useful when evaluating the rough, but they should not be interpreted as the guaranteed face-up color of a finished gemstone. Final color will depend strongly on orientation, finished depth, facet arrangement, and the amount of material removed during cutting.

Internal & External Features

The rough is slightly included and displays visible natural internal features. The supplied close-up views also show surface pressure marks and irregular natural surface characteristics.

Strong transmitted illumination provides a clearer view through portions of the body, helping to identify differences in transparency and the position of internal and surface-reaching features.

For a large piece of rough like this, these characteristics need to be mapped carefully before preforming. Removing a problematic surface area without unnecessarily sacrificing clean material can have a significant effect on final yield.

Cutting, Specimen, or Treatment Potential

This garnet is presented primarily as facet-grade rough for professional cutting evaluation.

Its 21.00 ct starting weight and substantial depth provide several possibilities for planning, but the final design should not be selected from external dimensions alone. A cutter should first examine the direction of the strongest color, internal inclusions, surface pressure marks, usable clean areas, depth, and expected weight retention.

A larger faceted gemstone may be possible depending on what is found during detailed examination and preforming, but no finished size, weight, clarity, or color result should be guaranteed beforehand.

Source & Ethical Position

Danushka Gems & Minings works directly with gemstone-producing areas across Sri Lanka, combining source knowledge with practical rough evaluation. This garnet is connected to Kolonna village around mining in Sri Lanka, in the Sabaragamuwa Province dry-zone area.

Our approach is to present natural rough realistically—including visible inclusions, surface characteristics, color behavior, and cutting considerations—so cutters, dealers, jewelers, collectors, and international gemstone buyers can make informed decisions before transformation begins.