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Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2136111141

Certificate GIA 2136111141

Diamond specifications and retailer prices

From $10,321 SGD
As of November 1, 2026
Save $4,021 SGD (28%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $19,122 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2136111141. Listed at 13 retailers as of November 1, 2026, with a 39% 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

1.23
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2136111141
Dimensions6.94 × 6.92 × 4.18 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.94 mm6.92 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2136111141
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 60.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $19,122 SGD|Low: $10,126 SGD|High: $19,122 SGD|Avg: $13,798 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$10,321 SGD
Retailer 4$10,848 SGD
Retailer 7$11,473 SGD
Retailer 2$12,461 SGD
Retailer 8$12,621 SGD
Retailer 3$13,820 SGD
Retailer 5$17,918 SGD
NZ Jewellers$19,122 SGD

40 data points across 8 retailers

13 retailers$10,321 SGD to $14,342 SGD

B
Cheapest Retailer
-
$10,321 SGD
B
Retailer 2
-
$10,848 SGD
View
B
Retailer 3
-
$11,473 SGD
View
Final sale: no returns
B
Retailer 4
-
$12,429 SGD
View
B
Retailer 5
-
$12,461 SGD
View
B
Retailer 6
-
$12,621 SGD
View
B
Retailer 7
-
$13,654 SGD
View
B
Retailer 8
-
$13,654 SGD
View
B
Retailer 9
-
$13,820 SGD
View
B
Retailer 10
-
$14,101 SGD
View
B
Retailer 11
-
$14,342 SGD
View
Retailer 12
-
$17,918 SGD
View
Price under review
Most Expensive
NZ Jewellers
d468309c-1b94-4227-b591-484861551621 · Nov 5
$19,122 SGD
$14,971 USD
View
Price under review
12 more retailers have this diamond
Prices start from $10,321 SGDSave up to $4,021 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.

B
1.23ct Round
$10,321 SGD