CaratHunter
Plans
Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 6552452687

Certificate GIA 6552452687

Diamond specifications and retailer prices

From €7,587 EUR
$8,510 USD
As of November 1, 2026
Save €2,006 EUR (21%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €9,593 EUR at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552452687. Listed at 6 retailers as of October 29, 2026, with prices from €7,587 to €9,593, a €2,006 spread on the same certified stone. Blue Nile lists it at €9,593. 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

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6552452687
Dimensions11.39 × 5.94 × 3.76 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle, Indented Natural
Top View
11.39 mm5.94 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6552452687
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.3%

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: Nov 1
Current: €9,593 EUR|Low: €7,345 EUR|High: €10,319 EUR|Avg: €8,539 EUR|-7.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 4€7,587 EUR
Retailer 3€7,664 EUR
Retailer 5€8,205 EUR
Retailer 2€8,229 EUR
Retailer 6€8,557 EUR
Retailer 7€9,261 EUR
Blue Nile€9,593 EUR

37 data points across 7 retailers

6 retailers€7,587 EUR to €9,593 EUR

A
Cheapest Retailer
-
€7,587 EUR
$8,510 USD
A
Retailer 2
-
€7,664 EUR
SGD 11,616 SGD
View
A
Retailer 3
-
€8,205 EUR
$9,203 USD
View
A
Retailer 4
-
€8,229 EUR
£7,267 GBP
View
B+
Retailer 5
-
€8,557 EUR
$9,598 USD
View
Final sale: no returns
Most Expensive
B+
Blue Nile
29415853 · Oct 29
€9,593 EUR
$10,760 USD
View
5 more retailers have this diamond
Prices start from €7,587 EURSave up to €2,006 EUR

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
€7,587 EUR