100 Gems - September birthstone sapphire

正面描述	Seated female figure in period dress at left, set against a bamboo underprint vignette on a rose and blue guilloche ground. At centre, an intaglio-style sapphire gemstone brooch medallion with serial number below; denomination 100 in large numerals at lower right. Two cat silhouettes flank the lower field; decorative polymer window strip at right with geometric gem motifs.
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背面铭文	100 KASHMIR SAPPHIRE THE CORUNDUM GEMSTONE FAMILY HUNDRED GEMS THIS NOTE IS NOT LEGAL TENDER 100
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备注	Part of the Reserve Bank of India's "100 Gems" collector series, this note belongs to a limited commemorative program celebrating India's gemstone heritage. Sapphire is the traditional birthstone for September, historically associated with the Kashmir region, whose deep-blue "cornflower" sapphires commanded the highest prices on world markets before the mines were largely exhausted by the early twentieth century. India's connection to sapphire is old and well-documented — Mughal imperial records reference significant sapphire holdings in the treasury at Agra. Polymer substrate for commemorative Indian notes reflects a broader RBI shift toward test issues on non-paper stock, a material still uncommon in mainstream Indian circulation.

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