Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 5242057428

Certificate GIA 5242057428

Diamond specifications and retailer prices

From $4,619 USD
As of November 6, 2026
Save $3,947 USD (46%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,566 USD at MOH London · As of November 7, 2026
View at MOH London

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 5242057428. Listed at 20 retailers as of November 6, 2026, with prices from $4,619 to $8,566, a $3,947 spread on the same certified stone. MOH London lists it at $8,566. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
H
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.96°
Pavilion angle40.12°
OriginNatural
Grading LabGIA
CertificateGIA 5242057428
Dimensions10.52 × 5.57 × 3.42 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.52 mm5.57 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5242057428
Side View
Table 60.0%Crown 36.96°Girdle: STK-VTKPavilion 40.12°Culet: NoneDepth 61.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $8,566 USD|Low: $4,065 USD|High: $8,566 USD|Avg: $5,100 USD
MOH London
Retailer 2
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Retailer 26
November 7, 2026
Retailer 9$4,065 USD
Retailer 10$4,111 USD
Retailer 11$4,179 USD
Retailer 7$4,325 USD
Retailer 18$4,392 USD
Retailer 17$4,403 USD
Retailer 4$4,619 USD
Retailer 15$4,920 USD
Retailer 26$4,965 USD
Retailer 12$5,087 USD
Retailer 16$5,106 USD
Retailer 13$5,120 USD
Retailer 8$5,195 USD
Retailer 5$5,564 USD
Retailer 6$5,599 USD
Retailer 25$5,646 USD
Retailer 23$5,674 USD
Retailer 21$5,708 USD
Retailer 3$5,770 USD
Retailer 2$5,911 USD
Retailer 24$6,182 USD
Retailer 22$6,217 USD
Retailer 19$6,806 USD
Retailer 14$7,188 USD
Retailer 20$7,219 USD
MOH London$8,566 USD

23 data points across 26 retailers

20 retailers$4,619 USD to $8,566 USD

Retailer 1
-
$4,179 USD
Price last confirmed 14 days ago
Retailer 2
-
$4,325 USD
View
Price last confirmed 13 days ago
Retailer 3
-
$4,392 USD
View
Price last confirmed 13 days ago
Retailer 4
-
$4,403 USD
View
Price last confirmed 12 days ago
B
Retailer 5
-
$4,619 USD
View
Retailer 6
-
$4,920 USD
View
Price last confirmed 14 days ago
B
Retailer 7
-
$4,965 USD
View
Retailer 8
-
$5,087 USD
View
Price last confirmed 14 days ago
B
Retailer 9
-
$5,120 USD
View
B
Retailer 10
-
$5,564 USD
View
B
Retailer 11
-
$5,646 USD
View
B
Retailer 12
-
$5,674 USD
View
B
Retailer 13
-
$5,708 USD
View
B
Retailer 14
-
$5,770 USD
View
B
Retailer 15
-
$5,911 USD
View
B
Retailer 16
-
$6,182 USD
View
B
Retailer 17
-
$6,217 USD
View
Retailer 18
-
$7,188 USD
View
Price last confirmed 15 days ago
B
Retailer 19
-
$7,219 USD
View
Most Expensive
B
MOH London
9542D5213 · Nov 7
$8,566 USD
£6,745 GBP
View
19 more retailers have this diamond
Prices start from $4,619 USDSave up to $3,947 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
$4,619 USD