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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1555153399

Certificate GIA 1555153399

Diamond specifications and retailer prices

From $1,608 NZD
$905 USD
As of November 1, 2026
Save $3,379 NZD (68%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,987 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555153399. Listed at 12 retailers as of October 30, 2026, with prices from $1,608 to $4,987, a $3,379 spread on the same certified stone. NZ Jewellers lists it at $4,987. 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

0.66
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1555153399
Dimensions5.62 × 5.58 × 3.45 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.62 mm5.58 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1555153399
Side View
Table 57.0%CrownGirdle: MED-SLIPavilionCulet: NoneDepth 61.6%

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 1
Current: $4,987 NZD|Low: $1,512 NZD|High: $4,987 NZD|Avg: $2,236 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 8$1,608 NZD
Retailer 7$1,651 NZD
Retailer 2$1,834 NZD
Retailer 6$1,836 NZD
Retailer 9$1,875 NZD
Retailer 3$2,232 NZD
Retailer 10$2,243 NZD
Retailer 5$2,375 NZD
Retailer 4$2,914 NZD
NZ Jewellers$4,987 NZD

45 data points across 10 retailers

12 retailers$1,608 NZD to $4,987 NZD

Retailer 1
-
$1,484 NZD
$835 USD
Price last confirmed 39 days ago
Retailer 2
-
$1,491 NZD
$839 USD
View
Price last confirmed 49 days ago
B+
Retailer 3
-
$1,608 NZD
$905 USD
View
B+
Retailer 4
-
$1,651 NZD
$929 USD
View
B+
Retailer 5
-
$1,834 NZD
£813 GBP
View
B+
Retailer 6
-
$1,836 NZD
$1,033 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
$1,875 NZD
$1,055 USD
View
B+
Retailer 8
-
$2,232 NZD
€1,196 EUR
View
Retailer 9
-
$2,243 NZD
A$1,941 AUD
View
Price last confirmed 29 days ago
B
Retailer 10
-
$2,375 NZD
ZAR 21,591 ZAR
View
B
Retailer 11
-
$2,914 NZD
£1,291 GBP
View
Most Expensive
B
NZ Jewellers
3885b89d-0411-49f5-951e-d22d72438c8e · Oct 30
$4,987 NZD
$2,806 USD
View
11 more retailers have this diamond
Prices start from $1,608 NZDSave up to $3,379 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+
0.66ct Round
$1,608 NZD