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Marquise|Natural|IGI

1.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 837697198

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 837697198

Diamond specifications and retailer prices

From $3,596 USD
As of October 31, 2026
Save $3,523 USD (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,119 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 837697198. Listed at 13 retailers as of October 30, 2026, with prices from $3,596 to $7,119, a $3,523 spread on the same certified stone. NZ Jewellers lists it at $7,119. 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

1.51
Carat
I
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.1°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 837697198
Dimensions11.45 × 5.96 × 3.76 mm
L/W Ratio1.92
Girdle conditionFaceted
Top View
11.45 mm5.96 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 837697198
Side View
Table 61.0%Crown 38.1°Girdle: THK-VTKPavilion 40.3°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $7,119 USD|Low: $3,527 USD|High: $7,264 USD|Avg: $4,602 USD|-2.0%
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
November 2, 2026
Retailer 11$3,596 USD
Retailer 3$3,772 USD
Retailer 10$3,834 USD
Retailer 2$3,986 USD
Retailer 12$4,051 USD
Retailer 8$4,086 USD
Retailer 4$4,169 USD
Retailer 5$4,169 USD
Retailer 7$4,234 USD
Retailer 6$4,506 USD
Retailer 13$4,715 USD
Retailer 9$6,834 USD
NZ Jewellers$7,119 USD

30 data points across 13 retailers

13 retailers$3,596 USD to $7,119 USD

A
Cheapest Retailer
-
$3,596 USD
A
Retailer 2
-
$3,772 USD
View
Final sale: no returns
B+
Retailer 3
-
$3,834 USD
View
A
Retailer 4
-
$3,986 USD
£3,138 GBP
View
B+
Retailer 5
-
$4,051 USD
View
A
Retailer 6
-
$4,086 USD
View
Retailer 7
-
$4,169 USD
View
Price last confirmed 7 days ago
Retailer 8
-
$4,169 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$4,234 USD
View
B+
Retailer 10
-
$4,506 USD
€4,291 EUR
View
B+
Retailer 11
-
$4,715 USD
View
B+
Retailer 12
-
$6,834 USD
£5,381 GBP
View
Most Expensive
B+
NZ Jewellers
c6dbeeb5-510e-4935-8301-94ee64fb998d · Oct 30
$7,119 USD
View
12 more retailers have this diamond
Prices start from $3,596 USDSave up to $3,523 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.

A
1.51ct Marquise
$3,596 USD