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Round|Natural|GIA

1.66ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2516721223

Certificate GIA 2516721223

Diamond specifications and retailer prices

From $9,956 USD
As of November 2, 2026
Save $2,104 USD (17%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $12,060 USD at Jared · As of November 2, 2026
View at Jared

About this 1.66ct natural round diamond

This 1.66ct natural round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2516721223. Listed at 5 retailers as of November 2, 2026, with prices from $9,956 to $12,060, a $2,104 spread on the same certified stone. Jared lists it at $12,060. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.66
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2516721223
Dimensions7.49 × 7.53 × 4.70 mm
L/W Ratio1.01
Top View
7.49 mm7.53 mm1.66 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2516721223
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $12,060 USD|Low: $8,297 USD|High: $13,410 USD|Avg: $12,165 USD|-10.1%
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 10, 2026
Retailer 2$9,956 USD
Retailer 3$11,058 USD
Retailer 4$11,670 USD
Retailer 5$11,670 USD
Jared$12,060 USD

13 data points across 5 retailers

5 retailers$9,956 USD to $12,060 USD

B+
Cheapest Retailer
-
$9,956 USD
Final sale: no returns
B
Retailer 2
-
$11,058 USD
View
B
Retailer 3
-
$11,670 USD
View
B
Retailer 4
-
$11,670 USD
View
Most Expensive
B
Jared
154909130 · Nov 2
$12,060 USD
View
4 more retailers have this diamond
Prices start from $9,956 USDSave up to $2,104 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.66ct Round
$9,956 USD