Marquise|Natural|GIA

1.50ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6551670301

Certificate GIA 6551670301

Diamond specifications and retailer prices

From $11,401 USD
CA$15,835 CAD
As of October 30, 2026
Save $6,274 USD (35%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $17,676 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded E 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 6551670301. Listed at 9 retailers as of October 30, 2026, with prices from $11,401 to $17,676, a $6,274 spread on the same certified stone. MOH London lists it at $17,676. 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

1.50
Carat
E
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551670301
Dimensions11.43 × 5.89 × 3.77 mm
L/W Ratio1.94
Top View
11.43 mm5.89 mm1.50 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551670301
Side View
Table 60.0%CrownGirdle: THN-XTKPavilionCulet: NoneDepth 64.0%

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: Oct 30
Current: $17,676 USD|Low: $9,586 USD|High: $17,676 USD|Avg: $12,264 USD|+12.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 9$9,643 USD
Retailer 10$11,144 USD
Retailer 4$11,401 USD
Retailer 2$12,138 USD
Retailer 6$12,567 USD
Retailer 5$13,440 USD
Retailer 8$14,017 USD
Retailer 3$14,260 USD
Retailer 7$14,888 USD
MOH London$17,676 USD

24 data points across 10 retailers

9 retailers$11,401 USD to $17,676 USD

Retailer 1
-
$11,144 USD
A$17,144 AUD
Price last confirmed 28 days ago
B+
Retailer 2
-
$11,401 USD
CA$15,835 CAD
View
B+
Retailer 3
-
$12,138 USD
£9,558 GBP
View
B+
Retailer 4
-
$12,567 USD
View
B+
Retailer 5
-
$13,399 USD
View
B+
Retailer 6
-
$13,440 USD
View
B
Retailer 7
-
$14,017 USD
View
B
Retailer 8
-
$14,260 USD
€13,581 EUR
View
Most Expensive
B
MOH London
0F8B4BE1C · Nov 1
$17,676 USD
£13,918 GBP
View
8 more retailers have this diamond
Prices start from $11,401 USDSave up to $6,274 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+
1.50ct Marquise
$11,401 USD