Gypsum
Gypsum when fibrous—the fibres being long and straight—is known as “satin spar.” This material is frequently cut rounded, or en cabochon, across the fibres; sometimes it is cut in the form of beads, or of pear-shaped drops, which are mounted in ear-rings, scarf-pins, or necklaces. The material is frequently found in Russia, England, and elsewhere, and is cut in England or Russia. Some of the cut stones are mounted in brass, or gilded brass, and sold as luck stones at Niagara, the claim being made that the “satin spar” was taken from beneath the Falls at great peril, as occasionally small deposits of this kind of gypsum are found under the Falls.
From time to time small consignments of this material have been sent to Japan, as the Japanese value it possibly on account of its purity, or owing to the fact that it has the effect of the cat’s-eye. It is quite cheap, and at the same time very soft, so that it can be scratched with the finger-nail. That found in Russia is of a golden-yellow or salmon color, and is worked into various ornaments, the one popular form being egg-shaped, and, because of their form, such objects are frequently given as Easter gifts. The same material is also known in Egypt, and is cut in the same egg form, the ornaments being called “Pharaoh’s eggs,” although just which Pharaoh this refers to is not stated. They are also believed to possess qualities of protection and to bring good fortune.