Crystal of Beryl (aquamarine variety) with very well-defined crystal forms and a terminal pinacoid finely bevelled by pyramidal faces. It is transparent, lustrous, and displays an excellent, intense and uniform sky-blue colour. It is set on a matrix of Quartz crystals with very poorly developed prisms, enhancing the contrast between the two species.
Geologically, the aquamarine formed in evolved granitic pegmatites, where beryllium-rich fluids promoted the growth of high-quality crystals. The Quartz crystallized during the final stages of pegmatite consolidation from residual hydrothermal fluids, producing well-formed crystals associated with the Beryl.
Quỳ Châu District, Nghệ An Province, Bắc Trung Bộ (North Central Coast) Region Vietnam (2015)
Specimen size: 2.5 × 1.8 × 1.4 cm = 0.98” × 0.71” × 0.55”
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