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Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

ID • J/SI1 • GIA 1559636147

Certificate GIA 1559636147

Diamond specifications and retailer prices

From $3,778 SGD
$2,955 USD
As of October 30, 2026
Save $4,118 SGD (52%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $8,182 SGD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.2ct natural oval diamond

This 1.2ct natural oval sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1559636147. Listed at 29 retailers as of October 29, 2026, with a 109% 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

1.20
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1559636147
Dimensions8.59 × 5.92 × 3.54 mm
L/W Ratio1.45
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Cloud, Twinning Wisp, Cavity, Needle
Top View
8.59 mm5.92 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1559636147
Side View
Table 58.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 59.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $5,773 SGD|Low: $4,255 SGD|High: $7,949 SGD|Avg: $5,379 SGD|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 8$4,255 SGD
Retailer 9$4,326 SGD
Retailer 10$4,457 SGD
Retailer 6$4,595 SGD
Retailer 4$4,908 SGD
Retailer 11$4,951 SGD
Retailer 3$5,036 SGD
Retailer 5$5,498 SGD
Retailer 1$5,773 SGD
Retailer 2$6,851 SGD
Retailer 7$7,895 SGD

37 data points across 11 retailers

29 retailers$3,778 SGD to $7,895 SGD

B+
Cheapest Retailer
-
$3,778 SGD
$2,955 USD
B
Retailer 2
-
$3,996 SGD
$3,126 USD
View
B
Retailer 3
-
$4,110 SGD
$3,215 USD
View
Retailer 4
-
$4,255 SGD
$3,328 USD
View
Price last confirmed 68 days ago
Retailer 5
-
$4,255 SGD
$3,328 USD
View
Price last confirmed 40 days ago
Retailer 6
-
$4,255 SGD
$3,328 USD
View
Price last confirmed 30 days ago
B
Retailer 7
-
$4,255 SGD
$3,328 USD
View
B
Retailer 8
-
$4,272 SGD
$3,342 USD
View
B
Retailer 9
-
$4,326 SGD
CA$4,700 CAD
View
Retailer 10
-
$4,418 SGD
$3,456 USD
View
Price last confirmed 32 days ago
B
Retailer 11
-
$4,457 SGD
$3,486 USD
View
B
Retailer 12
-
$4,595 SGD
£2,830 GBP
View
B
Retailer 13
-
$4,820 SGD
$3,770 USD
View
B
Retailer 14
-
$4,820 SGD
$3,770 USD
View
B
Retailer 15
-
$4,908 SGD
£3,023 GBP
View
Retailer 16
-
$4,909 SGD
$3,840 USD
View
Price last confirmed 53 days ago
Retailer 17
-
$4,909 SGD
$3,840 USD
View
Price last confirmed 40 days ago
Retailer 18
-
$4,909 SGD
$3,840 USD
View
Price last confirmed 32 days ago
B
Retailer 19
-
$4,951 SGD
$3,873 USD
View
B
Retailer 20
-
$4,986 SGD
$3,900 USD
View
Retailer 21
-
$5,036 SGD
A$6,060 AUD
View
Price last confirmed 27 days ago
B
Retailer 22
-
$5,098 SGD
$3,988 USD
View
B
Retailer 23
-
$5,498 SGD
€4,096 EUR
View
B
Retailer 24
-
$5,773 SGD
ZAR 72,949 ZAR
View
B
Retailer 25
-
$6,851 SGD
$5,359 USD
View
B
Retailer 26
-
$7,895 SGD
£4,863 GBP
View
Retailer 27
-
$8,182 SGD
$6,400 USD
View
Price last confirmed 50 days ago
Retailer 28
-
$8,182 SGD
$6,400 USD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
edaa7ba8-bce8-4bff-81fa-16e451f7ab09 · Sep 29
$8,182 SGD
$6,400 USD
View
Price last confirmed 32 days ago
28 more retailers have this diamond
Prices start from $3,778 SGDSave up to $4,118 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+
1.20ct Oval
$3,778 SGD