All About Electric or Magnetic Gems and Precious Stones

The electric or magnetic gems, tourmaline, amber, and loadstone, possess not only great scientific interest, but demonstrate the fact that a certain energy really does proceed from some of these fair, ornamental objects, an energy that produces a positive action from without upon the human body. This may well serve to make us less resolutely sceptical as to the possible presence in gem-stones of some other forms of emanation not as yet susceptible of scientific determination.

The supersensitiveness of the innocent child-soul to the most delicate impressions, and hence to the radiations or emanations from precious stones, is well brought out in the pretty tale by Saxe Holme (Helen Hunt Jackson), entitled "My Tourmaline." The particular specimen here immortalized was one of the finest from the famous Mount Mica deposits in the State of Maine. One day, while on a country ramble, the little heroine's eye is caught by the color and sparkle of a brilliant crystal lodged in the gnarled roots of an old tree. In springing forward to secure this pretty treasure the girl trips on the outstanding roots, falls, and sprains her leg very seriously, so that she is laid up for six weeks. However, the beautiful crystal is her great consolation through the long, dreary weeks, and, strange to say, she comes to feel that it has a kind of life in it. This is manifested to her and also to some others, on touching the stone, by a pricking or tingling sensation in the hand; but to the child the sensations excited by the wonderful crystal, as perfectly formed as though cut by a lapidary, red at one end, green at the other, with a separating band of white, are much more pronounced. When it is placed in the little silken bag that has been made to hold it, and is laid against her cheek, her feverish restlessness gradually disappears and gives place to tranquil sleep. More than this, she is aware of a species of subconscious sympathy with the tourmaline. So intense is this sympathy that although the child consented to part with her crystal that it might be offered as a unique specimen to a foreign museum, and was heart-broken to learn that through some carelessness it had been lost while being taken thither, she recognized its presence long years after, when, travelling in Europe as a young bride, she entered the cabinet of an enthusiastic collector to view his specimens, and was in no wise surprised when she really found her "Stonie" there among his prized tourmalines.

In connection with this pretty recital it is interesting to note that the first chance observation of the attractive qualities of tourmalines is said to have been made in Amsterdam by a group of Dutch children whose attention had been attracted by a number of tourmaline crystals brought from the Orient, and who were puzzled to see bits of ash and straw attracted to the stones. This came to the knowledge of some Dutch lapidaries, who for a time called the stone Aschentrekker, or "Ash-Attractor." Our name tourmaline is derived from turmali, the name given the stone by the natives of Ceylon.

There seems some little likelihood that certain examples of the gem called lychnis and noted by Pliny may have been varieties of the tourmaline. As the first tourmalines brought to modern Europe came to Holland from Ceylon, we might conjecture that those kinds of lychnis said by Pliny to have been brought from India had a like origin. Of these Indian specimens, the finest examples of this gem, one kind resembled the carbuncle or ruby, while another bore the designation Ionia because its color was like that of the violet (in Greek ion). The most striking peculiarity of the lychnis was its power to attract straws or bits of paper, when it had been heated by the sun's rays or by hand-friction.

Such is the confusion in the statements made by the early Greek and Latin writers as to the emerald, under which generic name they seem to have included almost all green stones of any ornamental or other value, that we cannot absolutely reject the conjecture that Theophrastus (third century B.C.), the earliest of these writers on precious stones, might have referred to specimens of green tourmaline, when he states that the true emerald appeared to have been produced from jasper, as one of the Cyprian specimens was said to have consisted of one-half jasper and the other half emerald, the metamorphosis as yet being incomplete. We admit that if Theophrastus uses the word jasper here to signify the reddish variety, we would have the combination of green and red zones in a single crystal sometimes observable in tourmaline. How this can be reconciled with the previous statement of the same author that the Cyprian "emeralds" which came from the copper mines of that island were chiefly used for soldering gold, and hence seem to have been of the class of mineral called chrysocolla by ancient writers, is, however, not easy to suggest.

The so-called Brazilian emeralds mentioned by the Dutch mineralogist, Johann de Laet, as having been found shortly before 1647 in mines near Spiritus Sanctus, may perhaps have been green tourmalines. These crystals were described by Gesner as of cylindrical form, striated, and of a vitreous lustre; their color was like that of the prase and they were transparent. Although De Laet adds the assertion that the Oriental emerald (green corundum) was as hard as the sapphire, the Brazilian emeralds approached more closely to the Oriental in point of hardness than did emeralds from any other source of supply; and green sapphires have never been found in Brazil, while green tourmalines have been.

The earliest published work in which the electric properties of tourmaline are noted appears to be an anonymous or quasi anonymous treatise published in 1707, certain initial letters of the quaint title being italicized to indicate the initials of the author's name. The first scientist to derive the action of the so-called Aschentrekker or "Ash-Attractor" from electric energy is said to have been the great Linnaeus, who bestowed upon the tourmaline the name of the "Electrical Stone."

The attractive properties of the tourmaline are said to have been first brought to scientific notice by M. Louis Lemery, in a report made during 1717 to the French Academy of Sciences; however, Lemery was inclined to attribute them to magnetic influence. That these phenomena of attraction and repulsion were really due to the electric properties of the stone was first clearly brought out by the German physicist, Franz Ulrich Theodor Aepinus, and his conclusions were communicated to the Berlin Academy of Sciences in 1756. Aepinus made his experiments upon two specimens of tourmaline from Ceylon, which had been furnished him by Lehmann, a fellow-member of the Berlin Academy, who, as Aepinus frankly admits, first drew his attention to the electric action of the stone. That not only friction but heat also should develop the electric energy, both positive and negative, of the tourmaline, serves to differentiate it from many other potentially electric substances, in the case of which friction alone is effective.