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Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

ID • I/SI2 • GIA 6541821320

Certificate GIA 6541821320

Diamond specifications and retailer prices

From $3,357 USD
As of November 6, 2026
Save $4,655 USD (58%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $8,012 USD at NZ Jewellers · As of November 5, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541821320. Listed at 22 retailers as of November 5, 2026, with prices from $3,357 to $8,012, a $4,655 spread on the same certified stone. NZ Jewellers lists it at $8,012. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.17°
Pavilion angle41.24°
OriginNatural
Grading LabGIA
CertificateGIA 6541821320
Dimensions10.31 × 5.49 × 3.59 mm
L/W Ratio1.88
Top View
10.31 mm5.49 mm1.20 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6541821320
Side View
Table 57.0%Crown 38.17°Girdle: Slightly ThickPavilion 41.24°Culet: NoneDepth 65.3%

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: Nov 6
Current: $8,012 USD|Low: $3,357 USD|High: $8,012 USD|Avg: $4,898 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 10$3,357 USD
Retailer 6$3,666 USD
Retailer 11$3,730 USD
Retailer 4$3,795 USD
Retailer 5$3,845 USD
Retailer 3$4,166 USD
Retailer 14$4,166 USD
Retailer 15$4,166 USD
Retailer 7$4,254 USD
Retailer 9$4,501 USD
Retailer 2$4,522 USD
Retailer 13$4,807 USD
Retailer 8$5,175 USD
Retailer 12$7,325 USD
NZ Jewellers$8,012 USD

35 data points across 15 retailers

22 retailers$3,357 USD to $8,012 USD

B+
Cheapest Retailer
-
$3,357 USD
B+
Retailer 2
-
$3,666 USD
View
B+
Retailer 3
-
$3,730 USD
View
B+
Retailer 4
-
$3,795 USD
View
B+
Retailer 5
-
$3,845 USD
View
Final sale: no returns
B
Retailer 6
-
$4,150 USD
View
Retailer 7
-
$4,166 USD
View
Price last confirmed 8 days ago
B
Retailer 8
-
$4,166 USD
View
B
Retailer 9
-
$4,166 USD
View
Retailer 10
-
$4,166 USD
View
Price last confirmed 29 days ago
B
Retailer 11
-
$4,254 USD
View
B+
Retailer 12
-
$4,501 USD
View
B
Retailer 13
-
$4,510 USD
View
B
Retailer 14
-
$4,510 USD
View
B+
Retailer 15
-
$4,522 USD
View
B
Retailer 16
-
$4,660 USD
View
B
Retailer 17
-
$4,807 USD
View
Retailer 18
-
$4,807 USD
View
Price last confirmed 23 days ago
B
Retailer 19
-
$5,175 USD
View
Retailer 20
-
$5,200 USD
View
Price last confirmed 22 days ago
B
Retailer 21
-
$7,325 USD
View
Most Expensive
B
NZ Jewellers
fb7d9bd2-31bc-48ef-bd72-849a60980f7e · Nov 5
$8,012 USD
View
21 more retailers have this diamond
Prices start from $3,357 USDSave up to $4,655 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 Marquise
$3,357 USD