Why are pearls different colors?
Pearls come in a variety of colors and shades, from white, cream, and pink to black with blue, green, or purple overtones, with white, cream and grey the popular. The type of oyster, the thickness and number of layers of nacre, and possibly trace elements in the oyster's aquatic environment are some of the reasons for different colors as well as the base color, overtone, and iridescence. Cultured pearls are also sometimes dyed.
The color of a pearl depends on the Oysters environment.
Most pearls are white, sometimes with a creamy or pinkish tinge, but may be tinted with yellow, green, blue, brown, or black.
The unique luster, or orient, of pearls depends upon the reflection and refraction of light from the translucent layers and is finer in proportion as the layers are thinner and more numerous. The iridescence which some pearls display is caused by the overlapping of successive layers, which breaks up light falling on the surface.
South sea pearls are the color of their host oyster's mantle - and can be white, silver, pink, gold, cream, and any combination of these basic colors, including overtones of the various colors of the rainbow displayed in the pearl nacre of the oyster body itself.
Additional Information While the environment is a factor in a pearl's color it is a limited factor. The strongest defining factor is the type of mollusk. Different pearl mollusks produce different color for different reasons. South Sea Pearls
South Sea pearls are produced by the Pinctada maxima mollusk. There are two common varieties used in perliculture. The first is the silver-lip and the second is the gold lip. These colors refer to the the color of the mantle and the mother-of-pearl (nacre) which the mantle produces. The silver-lip is responsible for producing white, silver and white with rose overtone South Sea pearls while the gold-lip produces gold, yellow and champagne pearls. Of the two varieties, deep golden South Sea pearls are the most valuable, considered the most valuable cultured pearls in the world. Tahitian Pearls of Black South Sea pearls
These are pearls produced by the Pinctada margaritifera mollusk, otherwise known as the black-lip. Similar to pearls produced by the Pinctada maxima, the color is determined by the mantle color, specifically the color of the donor mantle tissue used in the grafting operation. Freshwater Pearls
Freshwater pearls come in a variety of natural colors. The colors are due to a myriad of reasons including but not limited to; the environment, the type of mussel used (Hyriopsis cumingii, Hyriosis schlegeli or Cristaria plicata), and the location of the graft within the host mussel's mantle tissue. Aniline Organic Dyes, Cobalt-60 Irradiation and Heat
Some pearls are treated to attain their colors. Many freshwater pearls are dyed in fancy bright colors, and many freshwater and akoya pearls are dyed dark. The dyes are aniline organic. Cobalt-60 radiation is also used to alter the validity of the manganese content in freshwater pearls and akoya pearl nuclei. Manganese is only present in freshwater mussel shell. It will darken freshwater pearls and darken akoya pearl nuclei which is composed of freshwater mussel shell. This will produce a dark, gray effect.
Heat is also used, primarily in Tahitian pearls, to attain the currently popular chocolate coloration.
By oyster's species, origin, shape and color, Pearls are further classified into the categories below: natural pearl, cultured pearls, freshwater pearls, saltwater pearl, akoya pearls, south sea pearls, tahitian pearls... there are still dozen kinds of pearls available while the most popular on the market are freshwater, akoya, south sea and tahitian. Tahitian pearls are borned with black colors, other three types of pearls have white color available. here is a detailed explainations about all…
While white, and more recently black, saltwater pearls are by far the most popular, other color tints can be found on pearls from the oceans. Pink, blue, champagne, green, black and even purple saltwater pearls can be encountered, but to collect enough of these rare colors to form a complete string of the same size and same shade can take years.
The natural color of a pearl result from a combination of several factors: 1. Body Color The predominant basic color of the pearl. 2. Overtone The one or more colors that overlie the body color. On black pearls these colors are usually easiest to see in the lighter areas of the pearl. On white pearls they are easier to see in the darker areas. 3. Iridescence A play of lustrous colors. They may be like…
According to http://www.karipearls.com/types-of-pearls.html, types of pearls fall into two main categories: freshwater and saltwater. Freshwater pearls can be found in lakes, rivers, creeks, or ponds. They may sometimes be irregular but come in a variety of beautiful colors. Saltwater pearls can be found in bays, oceans, gulfs or seas. These may also be irregularly shaped but are also beautiful. Pearls may either be man-made or naturally made (by mussels).
Natural pearls come in many shapes, however perfectly round ones are very rare. They are made up of calcium carbonate and conchiolin and are formed when a microscopic intruder or parasite enters a mollusk and settles inside the shell. The mollusk is irritated by the intruder and secrets the conchiolin/calcium carbonate repeatedly until a pearl is formed. Cultured pearls are formed when a tiny of mantle tissue from a donar shell is transplanted into a…
The color of pearls in Tahitian pearl necklaces vary. All black and all silver necklaces are available, as well as necklaces that have multiple colors. Most of the pearls on the multi-colored necklaces appeared to also be black and silver. However, there were also some gold, and some that appeared blue.
Pearls have eight basic shapes: circled, round,baroque, oval, pear, drop, button, and semi-round. Pearls that are perfectly round are the rarest, its shape is the most valuable one. About the colors that pears may present, they are classified on the grade of their colors. Saltwater is the most popular. Other colors of pearl are: Pink, champagne, green, black, and purple saltwater. However, to collect these rare colors to form a complete string of the same…