What gives rise to a rainbow in pearls?
“... three jewels compete
among themselves in glory: it yakhont, emerald and pearls “.
(Biruni, 1040) pearls costs
Among hundreds of other jewelry independently. He is not given birth by the earth, he mysteriously appears in sinks - zhemchuzhnitsa. It should not be ground and polished as other semi-precious stones, he is beautiful in itself, without processing. In hierarchy of jewels it steadily entered the top ten, moreover, there were in the history periods when on value it was considered as the second after diamond.
With what the pearls so attract us? It is not just a stone, it is semi-precious stone, it as if shines quiet soft velvety gloss from within. These are the thinnest modulations of color from hardly noticeable blinking to dazzling iridescent gloss. Such play of light or an iridization (from Latin “ rainbow “) also causes the main value of pearls, it “ chandeliers “ or “ oriyent “ as jewelers speak. It is magic gloss which charms a look and forces to see in pearls... What? Not clear future? Light memoirs? The left hopes?
Dairy - white or translucent the pearls with strong gloss are some kind of standard “ " clear water; or “ reference point “. However the pearls happen both blue, and pink, and greenish, and even black. Its color depends on many reasons. First of all, from a species of a mollusk in which it grows, and from the place where it is got.
Also impurity of water, its salinity, temperature and even a state of health of a mollusk influence.
In the Persian Gulf and at coast of India get faintly - pink and cream pearls. In the Sea of Japan - light-green. Serebristo - white - at Australia. At coast of Tahiti and in waters of the Gulf of Mexico - black.
Several words about jewelry from black pearls. Now in the West it is the most fashionable and untwisted novelties. This fashion also reached us. Nevertheless, the black pearls are known long ago - both at them, and at us. For example, presented two fine black pearls to Penelope Odysseus. Magnificent black, with bluish outflow, the pearls were got in the rivers of the Kola Peninsula. Just all new is well forgotten old.
What forces pearls to shine so? The matter is that each pearl is constructed of thousands of the thinnest concentric layers of a mineral of aragonite and organic substance of a konkhiolin. And each of these layers shines a rainbow as a soap bubble. Such is property of the thin films in a special way refracting light. Thousands of small rainbows concluded in a pearls droplet form its unique charm. Actually, the same gloss, and for the same reason, also nacre, but in a pearl, from - for its forms shines, this shine amplifies, concentrates.
By the way, about a form. In this parameter in Russia the pearls were distinguished in the 16th century. In those generous times not the separate pearl, not a string of pearls, and " was a measure; Misa “ that is bowl or sieve. Therefore sorted pearls not by a kernel, and the whole weight. Distinguished “ cattle “ pearls, that is such which freely rolled down from slightly inclined flat surface, and “ ugolchaty “ “ horned “ or “ urodovaty “ who lingered on it. Then irregular shape the pearls began to be called “ baroque “.
Not all pearls have faultless spherical shape. Moreover, such pearls are rare, and therefore are especially valuable. On the second place of a pearl of a pear-shaped form. However, tastes change from time to time. So, in Russia once the oblong pearls in the form of a cucumber were considered as the most valuable.
The sizes of natural pearls seldom exceed 6 mm. The price of larger pearls grows much quicker, than their size. And if the six-millimetric pearl costs about thirty dollars, then the price of a natural pearl of 8 mm in size reached 4000 US dollars.
Happens that find not one pearl in a sink, and a little, sometimes there is a lot of. So, once at coast of India found a sink with 87 pearls. Sometimes pearls grow together among themselves, forming bizzare shapes. The pearl " is absolutely unique; Southern cross “ found in 1886 at coast of Australia. It is really the cross which grew together from nine large pearls.
Accrete pearls or just pearls of especially irregular shape reminding outlines of a figure of people, animal and different monsters are called “ pararutting “. Pearls of especially large sizes, for example, the biggest pearl in the world " occur among them; Allah`s Head “ - it is typical pararutting. But about it - in the following article.