Feature
Gems & Gemology, Spring 1993, Vol. 29, No. 1
A New Gem Beryl Locality: Luumäki, Finland
Seppo I. Lahti and Kari A. Kinnunen
Strongly etched prismatic crystals of yellow, green, and pale blue gem beryl have been quarried from a pegmatite dike in Luumäki, Finland. To date, the pegmatite has yielded about 15 kg of gem beryl, minor amounts of facet-grade topaz, and many varieties of quartz. The gem beryls from Luumäki are similar in gemological properties and chemical composition to other pegmatitic beryls, such as those from Brazil and the Ukraine. Large primary fluid inclusions surrounded by micro-fracture halos may be diagnostic of the new locality.
