C de Cartier signature setting diamond solitaire necklace

Cartier 'C' 16 inches long necklace set with 1.80ct round brilliant cut diamond, color E, clarity VS1, GIA inscribed.
Suspended from 18k white gold cable chain.
The lock inscribed: Cartier 750, Serial Number.
Stamped with makers mark.

Measurements: 8mm by 9.5mm
Weight: 4.8 grams

Ref# 510-000-1115