170 Carat I VS2-SI1 Opera Round Brilliant Cut Diamond Necklace
This opera necklace presents 169.79 carats total weight in GIA-certified natural Round Brilliant diamonds, graded I color and VS2–SI1 clarity (Rosenberg ref. 96180). Assembling a calibrated suite of Round Brilliants exceeding 169 carats in matched color and clarity grades requires sourcing across an extended period — matched sets at this total weight are rarely encountered in either the primary or secondary market, placing this piece in a category defined by structural scarcity independent of market conditions.
GIA Color and Clarity: I Color on the D-Z Scale, VS2–SI1
GIA grades white diamond color on a continuous scale from D (colorless) to Z (light yellow). I color falls within the near-colorless range, where any trace of body color remains effectively invisible to the unaided eye when stones are face-up in a white metal setting. VS2 and SI1 clarity grades indicate inclusions of minor character: VS2 inclusions are not detectable without magnification, while SI1 inclusions — though visible under 10× loupe — carry no consequence for brilliance or structural integrity at standard viewing distances.
Round Brilliant Cut Across a Long Necklace Format
The Round Brilliant remains the reference standard for light performance in white diamonds — its 57 or 58 facets are optimized to maximize the return of white light, fire, and scintillation simultaneously. In an opera-length setting, uniform Round Brilliants generate a continuous, uninterrupted light event across the full circuit of the piece, an optical quality that step-cut or mixed-cut stones cannot replicate consistently at scale. Maintaining cut-grade uniformity across a matched suite of this aggregate weight is a logistical and sourcing achievement in itself.
Opera Necklace Construction and Setting Architecture
Opera-length necklaces — typically spanning 28 to 36 inches — demand a setting architecture engineered to maintain precise stone alignment and distribute weight evenly across the full length. Each Round Brilliant is individually mounted to allow maximum light entry from all directions while securing the stone against the torsional stress inherent in flexible necklace wear. The metalwork is constructed to provide structural continuity without visible mass, preserving the unbroken visual line of diamonds across the necklace’s full circuit.
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Care
Preserve the brilliance of your diamond through proper care. We recommend professional cleaning annually and safe storage in a jewelry box or pouch. Avoid exposure to harsh chemicals and extreme temperatures. Learn more about our complete care guide for detailed maintenance and storage best practices.
Warranty
Every Rosenberg piece comes with a warranty covering craftsmanship and authenticity. Our warranty protects against manufacturing defects and ensures your diamond’s certified quality. For warranty details, claims, or to register your purchase, contact our specialists.
Delivery
Your diamond is shipped via insured, tracked delivery with full insurance coverage included. Packages are carefully packaged in premium materials and require a signature upon delivery. Review our shipping and delivery policy for complete details about timelines and handling.