Marquise|Natural|IGI

1.20ct I SI1 Marquise Natural Diamond

EX • I/SI1 • IGI 809693964

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 809693964

Diamond specifications and retailer prices

From $2,892 USD
As of November 2, 2026
Save $2,067 USD (42%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,197 USD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise 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 IGI 809693964. Listed at 9 retailers as of November 1, 2026, with a 71% 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle39.9°
OriginNatural
Grading LabIGI
CertificateIGI 809693964
Dimensions10.72 × 5.58 × 3.42 mm
L/W Ratio1.92
Girdle conditionFaceted
Top View
10.72 mm5.58 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 809693964
Side View
Table 59.0%Crown 37.5°Girdle: THN-STKPavilion 39.9°CuletDepth 61.3%

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: Nov 2
Current: $2,892 USD|Low: $2,891 USD|High: $5,017 USD|Avg: $3,502 USD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 1$2,892 USD
Retailer 3$3,090 USD
Retailer 4$3,090 USD
Retailer 2$4,959 USD

30 data points across 4 retailers

9 retailers$2,892 USD to $4,959 USD

A
Cheapest Retailer
-
$2,892 USD
Retailer 2
-
$2,964 USD
View
Price last confirmed 42 days ago
Retailer 3
-
$2,964 USD
View
Price last confirmed 30 days ago
Retailer 4
-
$3,078 USD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
$3,090 USD
View
B+
Retailer 6
-
$3,090 USD
View
B
Retailer 7
-
$4,959 USD
View
Retailer 8
-
$6,197 USD
View
Price last confirmed 40 days ago
Most Expensive
NZ Jewellers
583fb28a-0137-4661-ab65-aa47e1f0a826 · Sep 29
$6,197 USD
View
Price last confirmed 38 days ago
8 more retailers have this diamond
Prices start from $2,892 USDSave up to $2,067 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.

A
1.20ct Marquise
$2,892 USD