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Marquise|Natural|GIA

0.78ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 1236939128

Certificate GIA 1236939128

Diamond specifications and retailer prices

From $975 USD
As of November 1, 2026
Save $1,175 USD (55%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,150 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.78ct natural marquise diamond

This 0.78ct natural marquise sits in the just-under-one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1236939128. Listed at 8 retailers as of October 29, 2026, with prices from $975 to $2,150, a $1,175 spread on the same certified stone. MOH London lists it at $2,150. 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

0.78
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1236939128
Dimensions8.87 × 4.91 × 3.24 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizeNone
Top View
8.87 mm4.91 mm0.78 ctJ / SI1
OriginNatural
CutExcellent
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 1236939128
Side View
Table 56.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 66.0%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $2,150 USD|Low: $975 USD|High: $2,164 USD|Avg: $1,408 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$975 USD
Retailer 8$1,205 USD
Retailer 6$1,290 USD
Retailer 7$1,290 USD
Retailer 5$1,330 USD
Retailer 3$1,333 USD
Retailer 2$1,633 USD
MOH London$2,150 USD

44 data points across 8 retailers

8 retailers$975 USD to $2,150 USD

A
Cheapest Retailer
-
$975 USD
B+
Retailer 2
-
$1,205 USD
View
B+
Retailer 3
-
$1,290 USD
View
B+
Retailer 4
-
$1,290 USD
View
B+
Retailer 5
-
$1,330 USD
View
B+
Retailer 6
-
$1,333 USD
£1,050 GBP
View
B
Retailer 7
-
$1,633 USD
€1,555 EUR
View
Most Expensive
B
MOH London
7A9F724BF · Oct 29
$2,150 USD
£1,693 GBP
View
7 more retailers have this diamond
Prices start from $975 USDSave up to $1,175 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
0.78ct Marquise
$975 USD