CaratHunter
Plans
Round|Natural|GIA

1.00ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 1236581481

Certificate GIA 1236581481

Diamond specifications and retailer prices

From $3,084 SGD
$2,412 USD
As of October 30, 2026
Save $1,657 SGD (35%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $7,274 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1236581481. Listed at 18 retailers as of October 30, 2026, with a 54% 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1236581481
Dimensions6.45 × 6.37 × 3.91 mm
L/W Ratio1.01
Star length55%
Lower girdle85%
Top View
6.45 mm6.37 mm1.00 ctE / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1236581481
Side View
Table 58.0%Crown 35°Girdle: Sli. ThickPavilion 40.8°Culet: NoneDepth 61.4%

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 30
Current: $4,740 SGD|Low: $2,917 SGD|High: $7,067 SGD|Avg: $4,030 SGD|+15.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 3$3,084 SGD
Retailer 5$3,102 SGD
Retailer 9$3,200 SGD
Retailer 2$3,388 SGD
Retailer 8$3,589 SGD
Retailer 11$3,817 SGD
Retailer 6$3,847 SGD
Retailer 4$4,466 SGD
Retailer 1$4,740 SGD
Retailer 10$4,844 SGD
Retailer 7$7,048 SGD

37 data points across 11 retailers

18 retailers$3,084 SGD to $4,740 SGD

A
Cheapest Retailer
-
$3,084 SGD
$2,412 USD
A
Retailer 2
-
$3,102 SGD
$2,427 USD
View
A
Retailer 3
-
$3,283 SGD
A$3,951 AUD
View
Retailer 4
-
$3,388 SGD
$2,650 USD
View
Price last confirmed 23 days ago
A
Retailer 5
-
$3,589 SGD
$2,808 USD
View
A
Retailer 6
-
$3,618 SGD
CA$3,931 CAD
View
Retailer 7
-
$3,783 SGD
$2,959 USD
View
Price last confirmed 23 days ago
Retailer 8
-
$3,783 SGD
$2,959 USD
View
Price last confirmed 23 days ago
Retailer 9
-
$3,817 SGD
$2,986 USD
View
Price last confirmed 23 days ago
B+
Retailer 10
-
$3,847 SGD
$3,009 USD
View
Retailer 11
-
$3,929 SGD
$3,073 USD
View
Price last confirmed 31 days ago
Retailer 12
-
$3,965 SGD
$3,102 USD
View
Price last confirmed 88 days ago
Retailer 13
-
$4,364 SGD
$3,414 USD
View
Price last confirmed 31 days ago
B+
Retailer 14
-
$4,466 SGD
€3,327 EUR
View
B
Retailer 15
-
$4,740 SGD
£2,920 GBP
View
Retailer 16
-
$4,844 SGD
$3,789 USD
View
Price last confirmed 22 days ago
Retailer 17
-
$7,048 SGD
£4,341 GBP
View
Price last confirmed 22 days ago
Most Expensive
NZ Jewellers
ccaa283b-e8da-4ed6-a203-eb9afb6e9e14 · Sep 27
$7,274 SGD
$5,690 USD
View
Price last confirmed 34 days ago
17 more retailers have this diamond
Prices start from $3,084 SGDSave up to $1,657 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
$3,084 SGD