The Pearl, its story, its charm, and its value

by Wallis Richard Cattelle

Few pearls are perfect. The great majority of small pearls even, fail in one or more of the ideal qualities, and as the size increases perfection becomes more rare. A perfect pearl is not necessarily of the finest luster, but it must be lustrous and of even luster all over. If round, it must be spherically round; if pear or ovoid, symmetrically so, and the skin must be free from blemishes.

Baroque and button pearls are naturally imperfect pearls, the former being fantastically irregular in shape and the latter partially deformed. Imperfections of shape in what are termed round pearls are more numerous than those unaccustomed to handling them would suppose.

A lot of pearls which to the casual glance seem to be all quite round, will be found often on close examination to contain many, if not a majority, that are not. Upon rolling them separately, irregularities will appear which the luster and contiguity of others concealed. It will be discovered that the domes of some are slightly flattened at one part of the sphere; in others at two opposite points so as to form a double domed disk. Very many have slight protuberances above the contour of the sphere, or places in the spherical line, which though not flat, are depressed. While these minor imperfections of shape do not materially hurt the beauty of the pearl, they do decrease the value somewhat, and as they are quite common even among fine selected pearls they accentuate the rarity of the perfectly spherical.

The adventures of a pearl from the moment when the mollusk begins to cover its nucleus with nacre, until the fisher squeezes it from the folds of the creature's mantle, are many and varied. A few only escape untoward happenings. The fortunate, born where the mollusk gathers and spreads its choice secretions of mother-of-pearl, with room to grow on every side, are nursed in the lap of good fortune and uncheckered, round out layer by layer to perfection.

But some are not so fortunate. In some way cramped, they are held against the unyielding shell and grow flat on one side. These are the button pearls. Others either from an irregular rolling, or unequal action of the mollusk's mantle, become imperfectly round. Sometimes foreign particles attach themselves to a growing pearl and becoming enveloped with it in future layers, make an uneven surface.

Not infrequently two round pearls grow side by side until they touch, and together are enveloped by succeeding deposits; a twinned pearl is the result. For some reason, drop and pear-shaped pearls are seldom imperfect in shape. They may not be ideal but the form is usually good and the contour even and regular. This would imply that the simple rolling motion by the fish is more regular than the more complicated movements necessary to form a sphere.

Imperfections in the texture and luster of the skin are said to be due to the movement of the growing pearl among the zones of the mollusk's mantle supplying the varied material for the epidermis, middle shell, and lining. The difficulties confronting this theory are explained in the chapter on the "Genesis of Pearls." These imperfections consist generally of dead white chalky spots and streaks, distributed over the surface of the pearl, oftentimes so small as to escape notice except under the loup. Sometimes these imperfections take the form of rings or bands which encircle the pearl. Pearls so marked are rarely if ever round, but ovoid, capsule, or cartridge shaped, and these chalky lines always encircle the cylinder; they never cross the dome. Rings around the dome occur, but the surface over them is of equal luster. Frequently the entire outer skin is without luster. Whether this arises from lack of some element in the exudations of the mollusk from which the pearl is created, or from an imperfect crystallization of the calcium carbonate, is not known. Such skins have the usual nacreous surface wave lines and are often lustrous immediately under the outer plates of the skin.

It is possible that these chalky skins may result from the extraction of the pearl from the mollusk during a transitional stage, and that the presence of spots and streaks of that character, scattered over an otherwise lustrous surface, indicates that the secretions of the creature's mantle did not hold some essential ingredient in sufficient quantity to secure perfect crystallization and thereby cover the entire surface with transparent plates of calcium carbonate. It may be also that a lack of essential elements in the creature's exudations, causes a cessation of the mantle's action which by all signs appears necessary for the production of transparent plates of nacre.

"Peelers" are pearls of imperfect skins having indications of a better one underneath. Speculators buy these pearls at a low price and skin them. Sometimes they are rewarded by a smaller, but much more valuable pearl. Many times the under skins are no better or worse, or if better, the loss in size and weight, together with the cost of the work, make it unprofitable.

Peeling should not be attempted with cylindrical shaped pearls having chalky bands or rings around them, as such imperfections usually penetrate to the interior in pearls of that character. Cylindrical pearls are almost invariably fresh-waters. The imperfections disclosed in the under skins by peeling, are commonly irregularities of shape which have been rounded over to the improvement of the sphericity of the pearl.