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Marquise|Natural|GIA

1.20ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6542456377

Certificate GIA 6542456377

Diamond specifications and retailer prices

From $2,816 USD
As of November 5, 2026
Save $3,670 USD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,486 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542456377. Listed at 20 retailers as of November 5, 2026, with prices from $2,816 to $6,486, a $3,670 spread on the same certified stone. NZ Jewellers lists it at $6,486. 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
K
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.23°
Pavilion angle39.12°
OriginNatural
Grading LabGIA
CertificateGIA 6542456377
Dimensions10.40 × 5.53 × 3.46 mm
L/W Ratio1.88
Girdle conditionVery Thick
Key to symbols
Feather, Crystal, Needle
Top View
10.40 mm5.53 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542456377
Side View
Table 60.0%Crown 38.23°Girdle: THK-VTKPavilion 39.12°Culet: NoneDepth 62.7%

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 5
Current: $6,486 USD|Low: $2,816 USD|High: $6,486 USD|Avg: $4,083 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
November 6, 2026
Retailer 8$2,816 USD
Retailer 6$2,995 USD
Retailer 12$3,050 USD
Retailer 13$3,373 USD
Retailer 14$3,373 USD
Retailer 4$3,503 USD
Retailer 2$3,612 USD
Retailer 5$3,825 USD
Retailer 7$3,830 USD
Retailer 3$3,892 USD
Retailer 11$4,340 USD
Retailer 9$4,544 USD
Retailer 10$6,210 USD
NZ Jewellers$6,486 USD

36 data points across 14 retailers

20 retailers$2,816 USD to $6,486 USD

B+
Cheapest Retailer
-
$2,816 USD
B+
Retailer 2
-
$2,995 USD
View
B+
Retailer 3
-
$3,050 USD
View
B
Retailer 4
-
$3,143 USD
View
B
Retailer 5
-
$3,255 USD
View
B
Retailer 6
-
$3,373 USD
View
Retailer 7
-
$3,373 USD
View
Price last confirmed 8 days ago
B
Retailer 8
-
$3,385 USD
View
B
Retailer 9
-
$3,481 USD
View
B
Retailer 10
-
$3,503 USD
View
B
Retailer 11
-
$3,612 USD
View
B
Retailer 12
-
$3,825 USD
View
Retailer 13
-
$3,825 USD
View
Price last confirmed 28 days ago
B
Retailer 14
-
$3,830 USD
View
B
Retailer 15
-
$3,892 USD
View
Retailer 16
-
$4,216 USD
View
Price last confirmed 22 days ago
B
Retailer 17
-
$4,340 USD
View
B
Retailer 18
-
$4,544 USD
View
B
Retailer 19
-
$6,210 USD
View
Most Expensive
C
NZ Jewellers
11a171f1-1057-4f87-b4c5-efd38b187b1f · Nov 5
$6,486 USD
View
19 more retailers have this diamond
Prices start from $2,816 USDSave up to $3,670 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
$2,816 USD