Saltwater Cultured Pearls from Pinctada radiata in Abu Dhabi (United Arab Emirates)

Al-Alawi, Abeer; Ali, Zainab; Rajab, Zainab; Albedal, Fatema; Karampelas, Stefanos

doi:10.15506/jog.2020.37.2.164

Cited by 2 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The position of the pearl in the mollusk is indicated by a black arrow. (Wehrmeister et al, 2008;Sturman, 2009;Krzemnicki et al, 2010;Otter et al, 2014;Sturman et al, 2016;Nilpetploy et al, 2018a;Manustrong, 2018;Al-Alawi et al, 2020). In many cases, voids are a key identification feature by which to differentiate NBC from natural pearls.…”

Section: Macro Image Rtx Image μ-Ct Imagementioning

confidence: 99%

“…Owing to the different appearances of both types of formation, they are separated into different groups in this article. Linear structures have been regarded as characteristic of NBC pearls from both saltwater and freshwater environments (Scarratt et al, 2000;Sturman, 2009;Krzemnicki et al, 2010;Sturman et al, 2016;Nilpetploy et al, 2018a;Manustrong, 2018;Al-Alawi et al, 2020). Interestingly, 5 of the 774 natural pearl samples also displayed linear structures (table 7).…”

Section: Macro Image Rtx Image μ-Ct Imagementioning

confidence: 99%

See 1 more Smart Citation

Internal Structures of Known Pinctada Maxima Pearls: Natural Pearls from Wild Marine Mollucks

Homkrajae¹,

Manustrong²,

Nilpetploy³

et al. 2021

G&G

View full text Add to dashboard Cite

P earls are biogenic gem materials that may form naturally without human intervention, or with assistance from humans in a culturing process. Natural and cultured pearls often display similar external appearances and occasionally cannot be differentiated without examining their internal structures. Over the last century, scientists and gemological laboratories have used film X-radiography and digital real-time microradiography (RTX) to reveal these interior growth patterns (

show abstract

Section: Macro Image Rtx Image μ-Ct Imagementioning

confidence: 99%

Section: Macro Image Rtx Image μ-Ct Imagementioning

confidence: 99%

Internal Structures of Known Pinctada Maxima Pearls: Natural Pearls from Wild Marine Mollucks

Homkrajae¹,

Manustrong²,

Nilpetploy³

et al. 2021

G&G

View full text Add to dashboard Cite

show abstract

“…Voids are often seen in saltwater NBC pearls, and gemologists use them to separate NBC from natural pearls. While P. maxima mollusks produce the majority of NBC pearls seen in the market, other Pinctada species also produce them (Wehrmeister et al, 2008; Sturman, 2009;Krzemnicki et al, 2010;Sturman et al, 2016Nilpetploy et al, 2018a;Manustrong, 2018;Al-Alawi et al, 2020). Thus, it was unexpected that only 10 of the 74 NBC pearls in this study dis-played void features.…”

Section: Number Of Samples Summary Of Internal Structures: Cultured Pearl Samplesmentioning

confidence: 60%

“…Three internal structural types-organic-rich concentric, void, and linear-have been reported in the majority of NBC pearls previously studied (Hänni, 2006;Wehrmeister et al, 2008;Sturman, 2009;Krzemnicki et al, 2010Krzemnicki et al, , 2011Sturman et al, 2016Sturman et al, , 2017Nilpetploy et al, 2018a;Manustrong, 2018;Manustrong et al, 2019;Al-Alawi et al, 2020). Most NBC pearls show characteristic structural features belonging to these three groups that allow gemologists to differentiate them from natural pearls.…”

Section: In Briefmentioning

confidence: 94%

“…The general technique for cultivating saltwater BC pearls was originally developed for the Japanese akoya pearl culturing industry before being accepted for other culturing operations globally (Otter et al, 2017). It begins with the insertion of a bead nucleus (referred to as a seeding or nucleation process), along with a small piece of mantle tissue (saibo in Japanese) that is cut from a donor mollusk in a grafting process and subsequently inserted into the gonad of a living host mollusk (Al-Alawi et al, 2020;Sturman et al, 2020). Shell bead nuclei are usually fashioned from American freshwater mussels of the Unionidae family such as washboard (Megalonaias nervosa), ebony (Fusconaia ebena), and three-ridge (Amblema plicata), which are the most widely used source material for saltwater BC pearl production (Hsu et al, 2016;Sturman et al, 2020).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Internal Structures of Known Pinctada Maxima Pearls: Cultured Pearls from Operated Marine Mollusks

Homkrajae¹,

Nilpetploy²,

Manustrong³

et al. 2021

G&G

View full text Add to dashboard Cite

Pinctada maxima (the silver-or gold-lipped pearl oyster), Pinctada margaritifera (the blacklipped pearl oyster), and Pinctada fucata (martensii) ("the akoya pearl oyster") are the main mollusks of the Pinctada genus that are commercially farmed. They are routinely used to produce bead cultured (BC) pearls and, as a consequence, sometimes also produce non-bead cultured (NBC) pearls (Otter et al., 2014;Sturman et al., 2016;Nilpetploy et al., 2018a). P. maxima is the largest species in the genus (Scarratt et al., 2012) and generally requires a minimum two-year growth period to yield BC pearls with the thickest nacre layers of all BC pearls (Gervis and Sims, 1992; Cartier and Krzemnicki, 2016). Cultured pearls from the P. maxima mollusk are often referred to as "South Sea" in the market.Australia is the largest producer of white P. maxima (silver-lipped) cultured pearls, while Indonesia, Myanmar, and the Philippines are major producers of "golden" P. maxima (gold-lipped) cultured pearls. The farms producing these pearls are located between the Tropic of Cancer and the Tropic of Capricorn, which coincides with the native P. maxima mollusk's geographic distribution. The silver-lipped shells are found mostly south of the equator, while the gold-lipped shells populate the region north of the equator (Strack, 2006). P. maxima mollusks used for pearl culturing production in Australia are predominantly wildcaught shells collected in accordance with the annual quota that takes the shell sizes into account (between 120 and 175 mm shell length) and allows fishing

show abstract

Saltwater Cultured Pearls from Pinctada radiata in Abu Dhabi (United Arab Emirates)

Cited by 2 publications

References 0 publications

Internal Structures of Known Pinctada Maxima Pearls: Natural Pearls from Wild Marine Mollucks

Internal Structures of Known Pinctada Maxima Pearls: Natural Pearls from Wild Marine Mollucks

Internal Structures of Known Pinctada Maxima Pearls: Cultured Pearls from Operated Marine Mollusks

Contact Info

Product

Resources

About