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Cushion|Natural|GIA

0.78ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 2215334678

Certificate GIA 2215334678

Diamond specifications and retailer prices

From $1,859 AUD
As of November 4, 2026
Save $2,017 AUD (52%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,876 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.78ct natural cushion diamond

This 0.78ct natural cushion sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2215334678. Listed at 9 retailers as of November 2, 2026, with prices from $1,859 to $3,876, a $2,017 spread on the same certified stone. MOH London lists it at $3,876. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2215334678
Dimensions9.67 × 4.66 × 2.94 mm
L/W Ratio2.08
Culet sizeNone
Top View
9.67 mm4.66 mm0.78 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateGIA 2215334678
Side View
Table 53.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,876 AUD|Low: $2,154 AUD|High: $3,924 AUD|Avg: $2,803 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5$2,154 AUD
Retailer 6$2,222 AUD
Retailer 3$2,444 AUD
Retailer 2$2,854 AUD
Retailer 4$3,304 AUD
MOH London$3,876 AUD

43 data points across 6 retailers

9 retailers$1,859 AUD to $3,876 AUD

B
Cheapest Retailer
-
$1,859 AUD
B
Retailer 2
-
$1,904 AUD
View
B
Retailer 3
-
$2,154 AUD
View
B
Retailer 4
-
$2,222 AUD
View
B
Retailer 5
-
$2,444 AUD
View
B
Retailer 6
-
$2,513 AUD
View
B
Retailer 7
-
$2,854 AUD
View
B
Retailer 8
-
$3,304 AUD
View
Most Expensive
B
MOH London
CECA453E8 · Nov 2
$3,876 AUD
£2,097 GBP
View
8 more retailers have this diamond
Prices start from $1,859 AUDSave up to $2,017 AUD

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
0.78ct Cushion
$1,859 AUD