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Cushion|Natural|GIA

0.51ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6193146707

Certificate GIA 6193146707

Diamond specifications and retailer prices

From $1,454 AUD
As of November 5, 2026
Save $1,551 AUD (52%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,005 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter 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 6193146707. Listed at 9 retailers as of November 2, 2026, with prices from $1,454 to $3,005, a $1,551 spread on the same certified stone. MOH London lists it at $3,005. 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

0.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6193146707
Dimensions4.63 × 4.62 × 3.22 mm
L/W Ratio1.00
Top View
4.63 mm4.62 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6193146707
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NDepth 69.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,005 AUD|Low: $1,486 AUD|High: $3,042 AUD|Avg: $2,231 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$1,486 AUD
Retailer 3$1,851 AUD
Retailer 5$2,145 AUD
Retailer 2$2,285 AUD
Retailer 4$2,532 AUD
MOH London$3,005 AUD

45 data points across 6 retailers

9 retailers$1,454 AUD to $3,005 AUD

B+
Cheapest Retailer
-
$1,454 AUD
B+
Retailer 2
-
$1,455 AUD
View
Retailer 3
-
$1,486 AUD
View
Price last confirmed 9 days ago
B
Retailer 4
-
$1,851 AUD
View
Retailer 5
-
$2,145 AUD
View
Price last confirmed 33 days ago
B
Retailer 6
-
$2,285 AUD
View
B
Retailer 7
-
$2,516 AUD
View
B
Retailer 8
-
$2,532 AUD
View
Most Expensive
B
MOH London
512FEF2A3 · Nov 2
$3,005 AUD
£1,626 GBP
View
8 more retailers have this diamond
Prices start from $1,454 AUDSave up to $1,551 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+
0.51ct Cushion
$1,454 AUD