Predetermined inclusion and exclusion criteria were specified to select the final 18 studies in the review sample. A subsequent review of reference lists also included two full-text dissertations. Systematic searches were carried out on six electronic databases, seeking original empirical studies examining the conceptualization, development, or validation of self-report impostor phenomenon scales. This systematic review examines trait impostor phenomenon measures and evaluates their psychometric properties against a quality assessment framework. However, to date, a systematic review examining the methodological quality of impostorism measures used to conduct such research has yet to be carried out. Increasingly, impostorism research has expanded beyond clinical and into applied settings. It is not a diagnosable condition yet observed in clinical and normal populations.
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Poindexter said.The impostor phenomenon is a pervasive psychological experience of perceived intellectual and professional fraudulence. “They’re unusual to find at auction, so when they do, people pay attention,” Mr. Borruso said - which would be appealing for many in the jewelry industry looking for ways to attract younger, and potentially less affluent, buyers.īut the price of spinels has been increasing. While a ruby might go for $40,000 a carat, a spinel of the same size and quality would garner only $1,000 to $7,000 a carat, Mr. “They are not as expensive as rubies and sapphires but still have similar beautiful colors,” Ms. “You can’t really tell which is which,” he said. Borruso, finished with his coffee, opened a vitrine and pulled out a pair of earrings featuring both pink diamonds and spinels.
Mascetti of Sotheby’s said, “perhaps sparkled by the discovery of spinel mines in Tanzania and by the continuous quest of jewelry houses to offer something different.”Īnd as the major source of pink diamonds, the Argyle mine in Western Australia, is scheduled to close at the end of the year, spinels are being considered as an alternative. “Recently we have noticed a renewed interest in this stone,” Ms. Poindexer of Christie’s said the color is natural: “Their high refractive index gives spinels lots of fire.”Īnother reason spinels are enjoying a comeback: There are simply more of them available. “We were fortunate enough,” he added, “to own one of the rarest hues ever found in spinel, a cobalt blue Vietnam natural spinel which we subsequently designed into an exquisite ‘Kissing Ring’ and sold it to a gem collector who recognized instantly the extreme rarity and value of this unique spinel.” When expertly cut, they exhibit a captivating brilliance and exceptional clarity.”Īlbert Boghossian, chief executive of the Geneva-based jewelry company that bears his family name, said he was similarly struck by the spinel’s surprising range of colors, writing in an email that it is “a magical stone with its numerous hues and tonalities.” We only use spinels that display a specific shade of red - those that exhibit a strong, even, perfectly saturated hue. “The finest spinels display a bright, vitreous luster.
“In recent years I’m using spinels even more than before,” Ms.
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