Different Pearl Types & Colors | The Four Major Types of Cultured …
Perhaps the best-loved gems of all time, pearls—both natural and modern cultured pearls—occur in a wide variety of colors. The most familiar colors are white and cream (a light yellowish brown). Black, gray, and silver are also fairly common, but the palette of pearl colors extends to every hue.
Pearl Quality 101 – How GIA Examines and Classifies Pearls - GIA 4Cs
Jun 28, 2016 · GIA issues two types of pearl reports for loose, strung, or mounted natural or cultured pearls: Identification and Classification Reports. Learn what each report offers and the differences between the two.
I have seen some very strongly and brightly colored pearls: are
While pearls can naturally occur in every hue and be very saturated in color, pearl colors can be treated to alter their appearance. The most common color treatment is dyeing, and it is more common with freshwater pearls than saltwater pearls.
Unique Non-Bead Cultured Freshwater Pearls from Lake Biwa ... - GIA
Jun 1, 2001 · GIA’s Tokyo laboratory received for study 28 pearl samples with a stated Biwa provenance from Jinbo Pearls, a Shiga-based company that deals exclusively with freshwater pearls from Lake Biwa.
Garry Du Toit, Andy H. Shen, and Christopher M. Breeding. Treated-color brown Tahitian cultured pearls, known in the trade as “Chocolate Pearls,” have become increasingly prevalent in the market. As a result, it is important that the durability of the color treatment is well understood.
Freshwater Natural Pearls from the Concho River, Texas
Oct 7, 2016 · Lesser-known sources of natural freshwater pearls are the Colorado River and Brazos River and their tributaries in the state of Texas. However, the best samples are sometimes found in a species named Tampico Pearlymussel (Cyrtonaias tampicoensis) that inhabits the Concho River in West Texas.
Large Natural Quahog Pearl | Gems & Gemology - GIA
Aug 3, 2015 · This quahog pearl’s large size, clean surface, fabulous luster, near-round shape, and evenly distributed rich color combine to make it an exceptionally fine and rare example of its type. A purple non-nacreous specimen is revealed to be a natural northern quahog pearl.
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PEARL - GIA 4Cs
Jun 6, 2014 · Rich natural-brown Tahitian pearls are available but are exceptionally rare. Q: WHAT’S A MAJORCA “PEARL”? A: Majorca Pearl is a brand name of imitation pearls that were originally manufactured in Majorca, Spain.
Natural Shell Blisters and Blister Pearls: What’s the Difference?
A natural pearl (A-1) attached to the inner surface of the Pinctada maxima shell in which it formed (A), and the brown organic-rich attachment areas on the shell and pearl after the latter’s removal by hand (B). Photos by Areeya Manustrong.
Abalone Pearls Bibliography - GIA
This bibliography has been prepared as an aid for people interested in abalone pearls. It is a selection of citations to gemology journal articles that discuss both natural and cultured abalone pearls, their formation, characteristics, and nomenclature.