Glittering Stones >> Semi
precious stones >> Pearl
Semi Precious Stone Pearl
A pearl is a very hard, rounded secretion formed inside
the shell of certain bivalve mollusks. As a response to an irritating
object inside its shell, the mollusk would deposit layers of calcium carbonate
(CaCO3) in the form of the minerals aragonite
and calcite (crystalline forms of calcium carbonate) held together by
an organic horn-like compound known as conch Olin.
 |
HIstorical Facts Of Pearl| Chemical Composition |
CaCO3 |
| Hardness |
3.5 - 4.0 |
| Density |
2.66 – 2.78+ |
| Ocurrence |
China, Japan |
| Sign of the Zodiac |
Cancer |
| Month of the year |
June |
| Color |
Orange, Pink, white, Gray, Light purple, Rose, Black, Brown, Gold, Yellow, Silvery, Green, Blue, Bronze. |
|
Precious Stone Pearl
|
|
