Luster measures the rate of reflection (how crisp and detailed it is) on a pearl’s surface, and the amount of light reflected on the pearls.
Beautiful luster makes or breaks pearls as a gemstone - pearls without great luster can end up looking like chalky beads. Basically, the brighter, sharper and more reflective a pearl is, the more valuable it will be.
Certain pearl types like the saltwater Japanese Akoya are more likely to display sharper luster than others.
Oysters that live in warmer climates (such as the large South Sea pearl oyster, Pinctada maxima, native to Australia and the Philippines) have what we generally term as “Satiny” luster, which appears as somewhat soft and diffuse around the edges, as seen above.
I like to describe it as "touchable" as these pearls have a deeper glow that begs to be touched, rather than a bright shininess.
A trail of sparkling white diamonds illuminates the way to one of the ocean's most coveted treasures: a pair of luminous White South Sea pearls. Shimmering in gorgeous shades of Silver, Rose and subtle Cream overtones these rare pearls are are known the world over as being some of the largest and most beautiful in the world!
Each gorgeous South Sea pearl is AAA quality, and has been hand-selected for its bright luster, perfectly round shape and shimmering pastel hues. Four VS1-GH quality round-brilliant diamond accents weigh .05cts each, 0.20cts total per earring or 0.40cttw for the pair, and are meticulously set in this 14K gold dangle earring mounting.
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