The Book of Secrets: Of the Virtues of Herbs, Stones, and Certain Beasts, (1550, Old English). Here's a modern 20-page introduction.
George Frederick Kunz
Gems and Precious Stones of North America,
Natal Stones: Sentiments and Superstitions Connected with Precious Stones, (1st edition, 1892, Tiffany & Co, New York). Here's the 2nd edition, published in 1909.
Folklore of Precious Stones. (1894, Schulte Publishing Co., New York)
The Curious Lore of Precious Stones,(1913, J.B. Lippincott Co., Philadelphia)
The Magic of Jewels and Charms, (1915, J.B. Lippincott Co., Philadelphia)
Shakespeare and Precious Stones, (1916, J.N. Lippincott Co., Philidelphia)