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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 HK$7,650 HKD
$975 USD
As of November 1, 2026
Save HK$9,130 HKD (54%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$16,780 HKD at MOH London · As of November 2, 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 November 1, 2026, with prices from HK$7,650 to HK$16,780, a HK$9,130 spread on the same certified stone. MOH London lists it at HK$16,780. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$16,780 HKD|Low: HK$7,650 HKD|High: HK$16,980 HKD|Avg: HK$11,050 HKD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4HK$7,650 HKD
Retailer 8HK$9,455 HKD
Retailer 6HK$10,121 HKD
Retailer 7HK$10,121 HKD
Retailer 5HK$10,435 HKD
Retailer 3HK$10,459 HKD
Retailer 2HK$12,811 HKD
MOH LondonHK$16,780 HKD

44 data points across 8 retailers

8 retailersHK$7,650 HKD to HK$16,780 HKD

A
Cheapest Retailer
-
HK$7,650 HKD
$975 USD
B+
Retailer 2
-
HK$9,455 HKD
$1,205 USD
View
B+
Retailer 3
-
HK$10,121 HKD
$1,290 USD
View
B+
Retailer 4
-
HK$10,121 HKD
$1,290 USD
View
B+
Retailer 5
-
HK$10,435 HKD
$1,330 USD
View
B+
Retailer 6
-
HK$10,459 HKD
£1,050 GBP
View
B
Retailer 7
-
HK$12,811 HKD
€1,555 EUR
View
Most Expensive
B
MOH London
7A9F724BF · Nov 2
HK$16,780 HKD
£1,684 GBP
View
7 more retailers have this diamond
Prices start from HK$7,650 HKDSave up to HK$9,130 HKD

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
HK$7,650 HKD