Books are the training weights of the mind. Epictetus, ca. 50–135 CE
Brush, ink, paper and ink stone. Known in China as the “Four Treasures,” these simple tools give humanity the power to communicate across time—even beyond death—granting immortality to knowledge. Inspired by their enduring significance, we’ve named our reference database in their honor.
Lotus Gemology believes scholarship belongs to all humankind. Towards that goal, we are opening access to our internal reference database—built over nearly four decades and thousands of hours of dedicated work—free of charge.
The Four Treasures database includes thousands of references in gemology, mineralogy, and related fields, with particular strengths in corundum, jade, emerald, spinel, color science, glyptic art, history and Arabic-language sources. Note that cover images may not exactly match the edition/issue of the publication in question.
10,635 references total
Hidden Treasures | Lotus Gemology's Special Literature GuidesFor those who wish to explore the literature of gems further, we recommend the following:
Key Reference BooksBelow are listed key reference sources for the literature on gems, minerals, jewelry and allied fields. To access a full list with cover images and abstracts, just do a general search on "bibliography" in our Four Treasures Reference Database.
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