{"id":38862,"date":"2026-08-30T08:30:00","date_gmt":"2026-08-30T08:30:00","guid":{"rendered":"https:\/\/ckystones.com\/?p=38862"},"modified":"2026-10-05T03:09:09","modified_gmt":"2026-10-05T03:09:09","slug":"la-famille-des-beryls-lelegance-cristalline","status":"publish","type":"post","link":"https:\/\/ckystones.com\/en\/la-famille-des-beryls-lelegance-cristalline\/","title":{"rendered":"The beryl family: crystalline elegance"},"content":{"rendered":"
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When discussing the great gemstones, emerald immediately comes to mind. Yet few people know that this gem, alongside morganite, heliodor, goshenite, aquamarine and the very rare red beryl, belongs to a single mineral species: beryl.
This family holds a privileged place in gemmology. It brings together some of jewellery's most prestigious stones while offering an exceptional diversity of colours. Behind this richness lies a remarkably stable crystal structure, capable of accommodating different chemical elements that profoundly alter the stone's appearance. Just traces of chromium, iron or manganese are enough to transform a colourless crystal into a deep-green emerald or a delicate pink morganite.
Found on every continent, mined for several millennia and still highly sought-after by collectors and jewellers alike, beryl perfectly illustrates how geology can shape some of nature's most beautiful creations.<\/p>\n\n\n\n

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Composition and structure<\/p>\n\n\n\n

Beryl is a beryllium aluminium cyclosilicate with the chemical formula:
Be\u2083Al\u2082Si\u2086O\u2081\u2088
It crystallises in the hexagonal system, generally forming long prisms with a hexagonal cross-section, sometimes perfectly developed. Some crystals reach several metres in length and rank among the largest natural crystals ever discovered.
Its structure consists of stacked silicate rings that form tiny channels parallel to the crystal axis. These crystals can accommodate various chemical elements or fluids, explaining both the range of colours and the presence of characteristic inclusions, particularly common in emeralds, for example.<\/p>\n\n\n\n

Beryl has a hardness of between 7.5 and 8 on the Mohs scale, making it suitable for jewellery. Cleavage is indistinct, but certain heavily included varieties remain vulnerable to breakage, requiring careful cutting. This is particularly true of emeralds, whose many natural fissures make the lapidary's work especially delicate.<\/p>\n\n\n\n

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A family of gems
Unlike garnet, whose different species have distinct chemical compositions, beryl varieties all belong to the same mineral species. Just a few elements present in very small quantities are enough to alter their colour.<\/p>\n\n\n\n