Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 7568597454

Certificate GIA 7568597454

Diamond specifications and retailer prices

From $3,216 USD
As of November 4, 2026
Save $2,900 USD (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,116 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 7568597454. Listed at 14 retailers as of November 4, 2026, with prices from $3,216 to $6,116, a $2,900 spread on the same certified stone. Helzberg Diamonds lists it at $6,116. 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
I
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle38.98°
Pavilion angle40.29°
OriginNatural
Grading LabGIA
CertificateGIA 7568597454
Dimensions10.11 × 5.45 × 3.56 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.11 mm5.45 mm1.20 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 7568597454
Side View
Table 55.0%Crown 38.98°Girdle: STK-ETKPavilion 40.29°Culet: NDepth 65.4%

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: $6,116 USD|Low: $3,216 USD|High: $6,116 USD|Avg: $4,211 USD
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 13$3,216 USD
Retailer 11$3,270 USD
Retailer 8$3,294 USD
Retailer 6$3,436 USD
Retailer 12$3,495 USD
Retailer 7$3,692 USD
Retailer 5$3,874 USD
Retailer 9$4,073 USD
Retailer 14$4,102 USD
Retailer 4$4,160 USD
Retailer 2$4,276 USD
Retailer 10$5,424 USD
Retailer 3$5,744 USD
Helzberg Diamonds$6,116 USD

23 data points across 14 retailers

14 retailers$3,216 USD to $6,116 USD

B+
Cheapest Retailer
-
$3,216 USD
B+
Retailer 2
-
$3,270 USD
View
B+
Retailer 3
-
$3,294 USD
View
B
Retailer 4
-
$3,436 USD
View
B
Retailer 5
-
$3,495 USD
View
B
Retailer 6
-
$3,692 USD
View
B
Retailer 7
-
$3,874 USD
View
B
Retailer 8
-
$4,073 USD
View
B
Retailer 9
-
$4,102 USD
View
B
Retailer 10
-
$4,160 USD
View
B
Retailer 11
-
$4,276 USD
View
C
Retailer 12
-
$5,424 USD
View
C
Retailer 13
-
$5,744 USD
View
Most Expensive
C
Helzberg Diamonds
XZRNLMOLPNKLK · Nov 6
$6,116 USD
View
13 more retailers have this diamond
Prices start from $3,216 USDSave up to $2,900 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
$3,216 USD