This page is currently not sponsored. Click here to sponsor this page.
A pearl is an organic mineral mixture formed with the soft living tissue of a shelled mollusk. Chemically pearls are made of calcium carbonate, either the mineral aragonite or a mixture of aragonite and calcite, sometimes also with minor vaterite.
Pearls are used as gemstones, but are not regarded as true minerals due to their organic origin.
Visit gemdat.org for gemological information about Pearl. Currently in public beta-test.
Classification of Pearl
Please feel free to link to this page.
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
Internet Links for Pearl
Localities for Pearl
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
|Fade toolbar when not in focus||Fix toolbar to bottom of page|
|Hide Social Media Links|
|Slideshow frame delay||seconds|
Locality Updated: Calbrita quarries, Alenquer, Lisbon District, PortugalFrom Rui Nunes, 27th Nov 2014 21:06:00