Marquise|Natural|GIA

1.20ct K SI1 Marquise Natural Diamond

VG • K/SI1 • GIA 1555561508

Certificate GIA 1555561508

Diamond specifications and retailer prices

From $2,781 USD
As of November 5, 2026
Save $2,875 USD (51%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $5,908 USD at NZ Jewellers · As of September 30, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1555561508. Listed at 10 retailers as of November 4, 2026, with a 103% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle39.97°
Pavilion angle40.64°
OriginNatural
Grading LabGIA
CertificateGIA 1555561508
Dimensions10.39 × 5.47 × 3.54 mm
L/W Ratio1.90
Culet sizeNone
Top View
10.39 mm5.47 mm1.20 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1555561508
Side View
Table 60.0%Crown 39.97°Girdle: MED-THKPavilion 40.64°Culet: NoneDepth 64.7%

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: $3,522 USD|Low: $2,496 USD|High: $5,739 USD|Avg: $3,523 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
Retailer 12
November 6, 2026
Retailer 2$2,496 USD
Retailer 3$2,735 USD
Retailer 7$2,781 USD
Retailer 12$2,943 USD
Retailer 10$3,033 USD
Retailer 9$3,370 USD
Retailer 11$3,370 USD
Retailer 1$3,522 USD
Retailer 4$3,686 USD
Retailer 6$3,953 USD
Retailer 8$4,942 USD
Retailer 5$5,656 USD

40 data points across 12 retailers

10 retailers$2,781 USD to $5,656 USD

B+
Cheapest Retailer
-
$2,781 USD
B
Retailer 2
-
$2,943 USD
View
B
Retailer 3
-
$3,033 USD
View
B
Retailer 4
-
$3,370 USD
View
B
Retailer 5
-
$3,370 USD
View
B
Retailer 6
-
$3,522 USD
View
B
Retailer 7
-
$3,953 USD
View
C
Retailer 8
-
$4,942 USD
View
B
Retailer 9
-
$5,656 USD
View
Most Expensive
NZ Jewellers
ce9108f9-6f9e-4a33-8266-5974e0a46584 · Sep 30
$5,908 USD
View
Price last confirmed 37 days ago
9 more retailers have this diamond
Prices start from $2,781 USDSave up to $2,875 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
$2,781 USD