18" Genuine Round Tahitian Black Pearl Charm 925 Sterling Silver Chain Necklace

Beautiful 100% authentic fine quality Tahitian black pearl charm chain necklace in 925 sterling silver

Pearl: 100% authentic fine quality B grade Tahitian black pearl (Please refer to A-D Tahitian pearl grading system for details.)
Pearl shape: round to slightly off round
Pearl measurement: variable: 10-11mm in diameter; 11-12mm in diameter; 12-13mm in diameter
Luster: high
Color: all natural black (not dyed or treated)
Nacre: greater than 0.8mm required by Tahitian law
Surface: possible lines and natural imperfections
Chain type: 1.25mm cable chain
Clasp: spring ring
Metal: variable: 925 sterling silver; yellow gold plated sterling silver; rose gold plated sterling silver
Necklace measurement: 16" with 2" extension (18" in total length)
Charm measurements: 2 1/8" L X 3/4" W

The A-D Pearl Grading System (The Tahitian & South Sea Pearl System)

A: Highest-quality pearl, very high luster and only minor imperfections over less than 10% of its surface.
B: High or medium luster. Surface may have some visible imperfections over no more than 30% of its surface area.
C: Medium luster with surface defects over not more than 60% of the surface area.
D: May have many slight defects over 60% of surface or deep defects over no more than 60% of surface.

Note: Actual pearl may vary in size, color and shade.