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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1555246897

Certificate GIA 1555246897

Diamond specifications and retailer prices

From $3,498 NZD
HK$15,400 HKD
As of November 1, 2026
Save $2,160 NZD (38%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,918 NZD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555246897. Listed at 21 retailers as of October 31, 2026, with a 62% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1555246897
Dimensions6.30 × 6.35 × 4.01 mm
L/W Ratio1.01
Top View
6.30 mm6.35 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555246897
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $5,375 NZD|Low: $3,414 NZD|High: $8,547 NZD|Avg: $4,924 NZD|-2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 12$3,498 NZD
Retailer 11$3,699 NZD
Retailer 7$3,767 NZD
Retailer 4$3,848 NZD
Retailer 5$3,852 NZD
Retailer 17$4,161 NZD
Retailer 3$4,223 NZD
Retailer 9$4,297 NZD
Retailer 6$4,791 NZD
Retailer 15$4,791 NZD
Retailer 10$4,890 NZD
Retailer 16$4,950 NZD
Retailer 8$5,315 NZD
Retailer 1$5,375 NZD
Retailer 14$5,630 NZD
Retailer 13$5,657 NZD
Retailer 2$8,074 NZD

33 data points across 17 retailers

21 retailers$3,498 NZD to $5,657 NZD

A
Cheapest Retailer
-
$3,498 NZD
HK$15,400 HKD
A
Retailer 2
-
$3,699 NZD
$2,085 USD
View
A
Retailer 3
-
$3,767 NZD
$2,123 USD
View
A
Retailer 4
-
$3,848 NZD
$2,169 USD
View
Final sale: no returns
A
Retailer 5
-
$3,852 NZD
$2,171 USD
View
A
Retailer 6
-
$3,889 NZD
A$3,372 AUD
View
B+
Retailer 7
-
$4,161 NZD
$2,345 USD
View
B+
Retailer 8
-
$4,223 NZD
$2,380 USD
View
Retailer 9
-
$4,297 NZD
$2,422 USD
View
Price last confirmed 25 days ago
Retailer 10
-
$4,496 NZD
$2,534 USD
View
Price last confirmed 33 days ago
B+
Retailer 11
-
$4,791 NZD
$2,700 USD
View
B+
Retailer 12
-
$4,791 NZD
$2,700 USD
View
B+
Retailer 13
-
$4,890 NZD
£2,170 GBP
View
B+
Retailer 14
-
$4,950 NZD
$2,790 USD
View
Retailer 15
-
$4,959 NZD
$2,795 USD
View
Price last confirmed 33 days ago
Retailer 16
-
$5,315 NZD
A$4,609 AUD
View
Price last confirmed 25 days ago
B+
Retailer 17
-
$5,375 NZD
€2,885 EUR
View
B+
Retailer 18
-
$5,630 NZD
$3,173 USD
View
B+
Retailer 19
-
$5,657 NZD
ZAR 51,511 ZAR
View
Retailer 20
-
$8,074 NZD
£3,583 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
593a8d85-e95d-4e46-bc6d-94eacbe213fd · Sep 27
$9,918 NZD
$5,590 USD
View
Price last confirmed 36 days ago
20 more retailers have this diamond
Prices start from $3,498 NZDSave up to $2,160 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.

A
1.00ct Round
$3,498 NZD