The Moonstone. "A Romance"

In order that the circumstances may be clearly understood, I must revert for a moment to the period before the assault, and to the stories current in our camp of the treasure in jewels and gold stored up in the Palace of Seringapatam. II One of the wildest of these stories related to a Yellow Diamond-a famous gem in the native annals of India. The earliest known traditions describe the stone as having been set in the forehead of the four-handed Indian god who typifies the Moon.
Partly from its peculiar colour, partly from a superstition which represented it as feeling the influence of the deity whom it adorned, and growing and lessening in lustre with the waxing and waning of the moon, it first gained the name by which it continues to be known in India to this day-the name of THE MOONSTONE. A similar superstition was once prevalent, as I have heard, in ancient Greece and Rome; not applying, however (as in India), to a diamond devoted to the service of a god, but to a semi-transparent stone of the inferior order of gems, supposed to be affected by the lunar influences-the moon, in this latter case also, giving the name by which the stone is still known to collectors.