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A Russian Maxixe beryl?
Lars Olov Andersson
Abstract: Maxixe beryl has a deep blue colour, which fades upon extended exposure of the crystal to daylight. In a 1976 publication a colourless Russian beryl was reported to contain a considerable amount of NO2. The published EPR spectrum of this beryl is similar to that of a bleached Maxixe beryl. Analysis of the colour centres of Maxixe beryl and the artificially created Maxixe-type beryl indicate that samples of this Russian beryl could display the blue colour of Maxixe beryl after irradiation.
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