Beryl is from the Greek word 'Beryllos' meaning 'the blue-green colour of the sea'. It is a species of mineral that includes the well known varieties emerald and aquamarine. The lesser known varieties of beryl also produce attractive gemstones, they are becoming more widely known through internet exposure. The term 'precious beryl' applies to all gem-quality beryl varieties, except emerald and aquamarine. The example above is a golden beryl.
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