Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 7558189177

Certificate GIA 7558189177

Diamond specifications and retailer prices

From $3,390 USD
As of November 4, 2026
Save $2,685 USD (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,075 USD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 7558189177. Listed at 15 retailers as of November 4, 2026, with prices from $3,390 to $6,075, a $2,685 spread on the same certified stone. Helzberg Diamonds lists it at $6,075. 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
SymmetryExcellent
FluorescenceFaint
Crown angle39.96°
Pavilion angle40.45°
OriginNatural
Grading LabGIA
CertificateGIA 7558189177
Dimensions10.13 × 5.47 × 3.52 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.13 mm5.47 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7558189177
Side View
Table 61.0%Crown 39.96°Girdle: MED-VTKPavilion 40.45°Culet: NoneDepth 64.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $6,075 USD|Low: $3,390 USD|High: $6,454 USD|Avg: $4,504 USD|-5.9%
Helzberg Diamonds
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
November 6, 2026
Retailer 11$3,390 USD
Retailer 13$3,445 USD
Retailer 10$3,543 USD
Retailer 9$3,623 USD
Retailer 5$3,700 USD
Retailer 6$3,870 USD
Retailer 8$3,890 USD
Retailer 3$4,312 USD
Retailer 4$4,361 USD
Retailer 7$4,508 USD
Retailer 2$4,703 USD
Retailer 12$5,717 USD
Retailer 14$6,070 USD
Helzberg Diamonds$6,075 USD

28 data points across 14 retailers

15 retailers$3,390 USD to $6,075 USD

B+
Cheapest Retailer
-
$3,390 USD
B+
Retailer 2
-
$3,445 USD
View
B+
Retailer 3
-
$3,543 USD
View
B+
Retailer 4
-
$3,623 USD
View
B+
Retailer 5
-
$3,700 USD
View
B+
Retailer 6
-
$3,870 USD
View
B+
Retailer 7
-
$3,890 USD
View
B+
Retailer 8
-
$4,312 USD
View
B+
Retailer 9
-
$4,361 USD
View
B+
Retailer 10
-
$4,508 USD
View
B
Retailer 11
-
$4,703 USD
View
B
Retailer 12
-
$4,930 USD
View
B
Retailer 13
-
$5,717 USD
View
B
Retailer 14
-
$6,070 USD
View
Most Expensive
B
Helzberg Diamonds
XZRNLLOHOPHNN · Nov 6
$6,075 USD
View
14 more retailers have this diamond
Prices start from $3,390 USDSave up to $2,685 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
$3,390 USD