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Round|Natural|GIA

1.64ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 5453378660

Certificate GIA 5453378660

Diamond specifications and retailer prices

From $21,242 NZD
$11,972 USD
As of October 31, 2026
Save $1,877 NZD (8%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $23,119 NZD at Jared · As of October 30, 2026
View at Jared

About this 1.64ct natural round diamond

This 1.64ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5453378660. Listed at 5 retailers as of October 30, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5453378660
Dimensions7.47 × 7.53 × 4.70 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.47 mm7.53 mm1.64 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5453378660
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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: Oct 31
Current: $23,119 NZD|Low: $21,242 NZD|High: $23,119 NZD|Avg: $22,339 NZD
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 3$21,242 NZD
Retailer 4$22,374 NZD
Retailer 5$22,374 NZD
Retailer 2$22,552 NZD
Jared$23,119 NZD

22 data points across 5 retailers

5 retailers$21,242 NZD to $23,119 NZD

B+
Cheapest Retailer
-
$21,242 NZD
$11,972 USD
B+
Retailer 2
-
$22,374 NZD
$12,610 USD
View
B+
Retailer 3
-
$22,374 NZD
$12,610 USD
View
B+
Retailer 4
-
$22,552 NZD
€12,105 EUR
View
Most Expensive
B
Jared
146703431 · Oct 30
$23,119 NZD
$13,030 USD
View
4 more retailers have this diamond
Prices start from $21,242 NZDSave up to $1,877 NZD

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
$21,242 NZD