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1.03ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 821603781

Shape and cutting style on the report: Round brilliant

Certificate IGI 821603781

Diamond specifications and retailer prices

From $2,653 SGD
$2,075 USD
As of October 28, 2026
Save $3,486 SGD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,139 SGD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1.03ct natural round diamond

This 1.03ct 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 IGI 821603781. Listed at 15 retailers as of October 27, 2026, with prices from $2,653 to $6,139, a $3,486 spread on the same certified stone. NZ Jewellers lists it at $6,139. 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

1.03
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 821603781
Dimensions6.40 × 6.46 × 4.00 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.40 mm6.46 mm1.03 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 821603781
Side View
Table 59.0%Crown 35.4°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.2%

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: Oct 28
Current: $6,139 SGD|Low: $2,458 SGD|High: $6,173 SGD|Avg: $3,442 SGD|-0.6%
NZ Jewellers
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
October 29, 2026
Retailer 4$2,653 SGD
Retailer 3$2,717 SGD
Retailer 8$2,842 SGD
Retailer 7$2,856 SGD
Retailer 14$2,936 SGD
Retailer 15$2,936 SGD
Retailer 5$2,940 SGD
Retailer 10$3,072 SGD
Retailer 6$3,115 SGD
Retailer 2$3,250 SGD
Retailer 12$3,388 SGD
Retailer 13$3,576 SGD
Retailer 11$3,661 SGD
Retailer 9$5,173 SGD
NZ Jewellers$6,139 SGD

24 data points across 15 retailers

15 retailers$2,653 SGD to $6,139 SGD

A
Cheapest Retailer
-
$2,653 SGD
$2,075 USD
Retailer 2
-
$2,717 SGD
$2,125 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
$2,842 SGD
£1,750 GBP
View
A
Retailer 4
-
$2,856 SGD
$2,234 USD
View
B+
Retailer 5
-
$2,936 SGD
$2,297 USD
View
Retailer 6
-
$2,936 SGD
$2,297 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
$2,940 SGD
$2,300 USD
View
B+
Retailer 8
-
$3,072 SGD
$2,403 USD
View
Retailer 9
-
$3,115 SGD
$2,436 USD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
$3,250 SGD
£2,002 GBP
View
B+
Retailer 11
-
$3,388 SGD
$2,650 USD
View
B+
Retailer 12
-
$3,576 SGD
ZAR 45,186 ZAR
View
B+
Retailer 13
-
$3,661 SGD
€2,727 EUR
View
B
Retailer 14
-
$5,173 SGD
£3,186 GBP
View
Most Expensive
B
NZ Jewellers
33babf20-f3b4-4f4a-96bc-bdf05beebe4f · Oct 27
$6,139 SGD
$4,802 USD
View
14 more retailers have this diamond
Prices start from $2,653 SGDSave up to $3,486 SGD

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
1.03ct Round
$2,653 SGD