Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

ID • J/SI1 • GIA 1559636147

Certificate GIA 1559636147

Diamond specifications and retailer prices

From $2,955 USD
As of October 30, 2026
Save $3,189 USD (52%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $6,400 USD 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 30, 2026, with a 108% 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
Color
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: $3,584 USD|Low: $3,328 USD|High: $6,218 USD|Avg: $4,212 USD|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8$3,328 USD
Retailer 9$3,384 USD
Retailer 10$3,486 USD
Retailer 1$3,584 USD
Retailer 5$3,840 USD
Retailer 11$3,873 USD
Retailer 3$3,939 USD
Retailer 7$4,301 USD
Retailer 6$4,516 USD
Retailer 2$5,359 USD
Retailer 4$6,144 USD

37 data points across 11 retailers

29 retailers$2,955 USD to $6,144 USD

B+
Cheapest Retailer
-
$2,955 USD
B
Retailer 2
-
$3,126 USD
View
B
Retailer 3
-
$3,215 USD
View
Retailer 4
-
$3,328 USD
View
Price last confirmed 68 days ago
Retailer 5
-
$3,328 USD
View
Price last confirmed 40 days ago
Retailer 6
-
$3,328 USD
View
Price last confirmed 30 days ago
B
Retailer 7
-
$3,328 USD
View
B
Retailer 8
-
$3,342 USD
View
B
Retailer 9
-
$3,384 USD
CA$4,700 CAD
View
Retailer 10
-
$3,456 USD
View
Price last confirmed 32 days ago
B
Retailer 11
-
$3,486 USD
View
B
Retailer 12
-
$3,584 USD
£2,822 GBP
View
B
Retailer 13
-
$3,770 USD
View
B
Retailer 14
-
$3,770 USD
View
B
Retailer 15
-
$3,840 USD
£3,023 GBP
View
Retailer 16
-
$3,840 USD
View
Price last confirmed 53 days ago
Retailer 17
-
$3,840 USD
View
Price last confirmed 40 days ago
Retailer 18
-
$3,840 USD
View
Price last confirmed 33 days ago
B
Retailer 19
-
$3,873 USD
View
B
Retailer 20
-
$3,900 USD
View
Retailer 21
-
$3,939 USD
A$6,060 AUD
View
Price last confirmed 28 days ago
B
Retailer 22
-
$3,988 USD
View
B
Retailer 23
-
$4,301 USD
€4,096 EUR
View
B
Retailer 24
-
$4,516 USD
ZAR 72,949 ZAR
View
B
Retailer 25
-
$5,359 USD
View
B
Retailer 26
-
$6,144 USD
£4,838 GBP
View
Retailer 27
-
$6,400 USD
View
Price last confirmed 51 days ago
Retailer 28
-
$6,400 USD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
edaa7ba8-bce8-4bff-81fa-16e451f7ab09 · Sep 29
$6,400 USD
View
Price last confirmed 32 days ago
28 more retailers have this diamond
Prices start from $2,955 USDSave up to $3,189 USD

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
$2,955 USD