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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 $2,520 SGD
HK$15,400 HKD
As of October 31, 2026
Save $3,297 SGD (57%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $7,146 SGD 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 25, 2026, with a 131% 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: Oct 31
Current: $2,520 SGD|Low: $2,460 SGD|High: $6,158 SGD|Avg: $3,549 SGD|-1.9%
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
October 31, 2026
Retailer 1$2,520 SGD
Retailer 7$2,714 SGD
Retailer 13$2,714 SGD
Retailer 4$2,773 SGD
Retailer 5$2,775 SGD
Retailer 17$2,998 SGD
Retailer 3$3,043 SGD
Retailer 9$3,096 SGD
Retailer 6$3,452 SGD
Retailer 15$3,452 SGD
Retailer 11$3,523 SGD
Retailer 16$3,567 SGD
Retailer 8$3,830 SGD
Retailer 12$3,890 SGD
Retailer 14$4,056 SGD
Retailer 10$4,076 SGD
Retailer 2$5,817 SGD

34 data points across 17 retailers

21 retailers$2,520 SGD to $5,817 SGD

A
Cheapest Retailer
-
$2,520 SGD
HK$15,400 HKD
A
Retailer 2
-
$2,714 SGD
$2,123 USD
View
A
Retailer 3
-
$2,714 SGD
$2,123 USD
View
A
Retailer 4
-
$2,773 SGD
$2,169 USD
View
Final sale: no returns
A
Retailer 5
-
$2,775 SGD
$2,171 USD
View
A
Retailer 6
-
$2,802 SGD
A$3,372 AUD
View
B+
Retailer 7
-
$2,998 SGD
$2,345 USD
View
B+
Retailer 8
-
$3,043 SGD
$2,380 USD
View
Retailer 9
-
$3,096 SGD
$2,422 USD
View
Price last confirmed 23 days ago
Retailer 10
-
$3,239 SGD
$2,534 USD
View
Price last confirmed 32 days ago
B+
Retailer 11
-
$3,452 SGD
$2,700 USD
View
B+
Retailer 12
-
$3,452 SGD
$2,700 USD
View
B+
Retailer 13
-
$3,523 SGD
£2,170 GBP
View
B+
Retailer 14
-
$3,567 SGD
$2,790 USD
View
Retailer 15
-
$3,573 SGD
$2,795 USD
View
Price last confirmed 31 days ago
Retailer 16
-
$3,830 SGD
A$4,609 AUD
View
Price last confirmed 23 days ago
B+
Retailer 17
-
$3,890 SGD
€2,898 EUR
View
B+
Retailer 18
-
$4,056 SGD
$3,173 USD
View
B
Retailer 19
-
$4,076 SGD
ZAR 51,511 ZAR
View
B
Retailer 20
-
$5,817 SGD
£3,583 GBP
View
Most Expensive
NZ Jewellers
593a8d85-e95d-4e46-bc6d-94eacbe213fd · Sep 27
$7,146 SGD
$5,590 USD
View
Price last confirmed 34 days ago
20 more retailers have this diamond
Prices start from $2,520 SGDSave up to $3,297 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
1.00ct Round
$2,520 SGD