19th century AD. A large square emerald with panel of calligraphic prayer text surrounded by faceted edges with more text, in a silver cell, openwork to the reverse, ribbed suspension loop; the text translated as 'There is no god but Allah, the living and the self-subsisting and eternal. No sleep nor slumber can seize him. His are all things in heaven and on earth. Who is there who can intercede with him in his presence? He knows what appears to his creations, before or after or behind them, nor shall they compass out of his knowledge except as he wills it. His throne extends over the heavens and the earth and he feels no fatigue in guarding and preserving them, for he is the most high, the supreme in glory.' 72 grams, 50mm (2"). From the family collection of a Hampstead gentleman; formerly acquired in the 1980s, supplied with geologic report No. TL005190, by geologic consultant Dr R. L. Bonewitz. Extremely fine condition.