Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 7553942310

Certificate GIA 7553942310

Diamond specifications and retailer prices

From $4,083 USD
As of November 6, 2026
Save $4,563 USD (53%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,369 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 H 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 7553942310. Listed at 22 retailers as of November 4, 2026, with a 112% 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7553942310
Dimensions12.52 × 5.27 × 3.09 mm
L/W Ratio2.38
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle, Indented Natural
Top View
12.52 mm5.27 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7553942310
Side View
Table 57.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.7%

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: $4,231 USD|Low: $4,083 USD|High: $8,761 USD|Avg: $5,942 USD|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$4,083 USD
Retailer 1$4,231 USD
Retailer 3$4,672 USD
Retailer 7$4,940 USD
Retailer 5$5,259 USD
Retailer 4$5,280 USD
Retailer 2$5,443 USD
Retailer 9$6,135 USD
Retailer 6$6,641 USD
Retailer 11$7,931 USD
Retailer 8$8,646 USD

25 data points across 11 retailers

22 retailers$4,083 USD to $8,646 USD

B+
Cheapest Retailer
-
$4,083 USD
B+
Retailer 2
-
$4,231 USD
View
B
Retailer 3
-
$4,672 USD
View
B
Retailer 4
-
$4,940 USD
View
B
Retailer 5
-
$5,023 USD
View
Final sale: no returns
B
Retailer 6
-
$5,109 USD
View
B
Retailer 7
-
$5,110 USD
View
Retailer 8
-
$5,189 USD
View
Price last confirmed 10 days ago
B
Retailer 9
-
$5,259 USD
View
B
Retailer 10
-
$5,280 USD
View
Retailer 11
-
$5,443 USD
View
Price last confirmed 8 days ago
Retailer 12
-
$5,443 USD
View
Price last confirmed 21 days ago
Retailer 13
-
$5,487 USD
View
Price last confirmed 28 days ago
B
Retailer 14
-
$5,596 USD
View
Retailer 15
-
$5,602 USD
View
Price last confirmed 36 days ago
Retailer 16
-
$5,602 USD
View
Price last confirmed 36 days ago
B
Retailer 17
-
$6,135 USD
View
Retailer 18
-
$6,464 USD
View
Price last confirmed 38 days ago
B
Retailer 19
-
$6,641 USD
View
Retailer 20
-
$7,931 USD
View
Price last confirmed 9 days ago
B
Retailer 21
-
$8,646 USD
View
Most Expensive
NZ Jewellers
2cfd165e-4653-47d8-a433-57989b77a399 · Sep 29
$9,369 USD
View
Price last confirmed 38 days ago
21 more retailers have this diamond
Prices start from $4,083 USDSave up to $4,563 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
$4,083 USD