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1.64ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 6505166190

Certificate GIA 6505166190

Diamond specifications and retailer prices

From €7,825 EUR
$8,777 USD
As of November 1, 2026
Save €6,798 EUR (46%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €14,624 EUR at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.64ct natural round diamond

This 1.64ct 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 6505166190. Listed at 6 retailers as of November 1, 2026, with prices from €7,825 to €14,624, a €6,798 spread on the same certified stone. NZ Jewellers lists it at €14,624. 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

1.64
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6505166190
Dimensions7.47 × 7.51 × 4.71 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.47 mm7.51 mm1.64 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505166190
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.9%

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 1
Current: €14,624 EUR|Low: €6,441 EUR|High: €14,624 EUR|Avg: €10,216 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 5€7,825 EUR
Retailer 4€8,071 EUR
Retailer 2€9,140 EUR
Retailer 3€12,185 EUR
NZ Jewellers€14,624 EUR

24 data points across 5 retailers

6 retailers€7,825 EUR to €14,624 EUR

B+
Cheapest Retailer
-
€7,825 EUR
$8,777 USD
B+
Retailer 2
-
€8,071 EUR
$9,052 USD
View
Final sale: no returns
B+
Retailer 3
-
€9,140 EUR
View
B
Retailer 4
-
€12,185 EUR
£10,761 GBP
View
B
Retailer 5
-
€14,365 EUR
£12,686 GBP
View
Most Expensive
B
NZ Jewellers
3fb6f9f3-83ae-47fe-9c61-f481b0b722a0 · Nov 2
€14,624 EUR
$16,402 USD
View
5 more retailers have this diamond
Prices start from €7,825 EURSave up to €6,798 EUR

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+
1.64ct Round
€7,825 EUR