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Cushion|Natural|GIA

0.51ct D SI1 Cushion Natural Diamond

VG • D/SI1 • GIA 6421683223

Certificate GIA 6421683223

Diamond specifications and retailer prices

From $1,164 AUD
As of November 6, 2026
Save $1,276 AUD (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,440 AUD at MOH London · As of November 4, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6421683223. Listed at 16 retailers as of November 4, 2026, with prices from $1,164 to $2,440, a $1,276 spread on the same certified stone. MOH London lists it at $2,440. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421683223
Dimensions4.68 × 4.18 × 2.92 mm
L/W Ratio1.12
Top View
4.68 mm4.18 mm0.51 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6421683223
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.8%

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: Nov 6
Current: $2,440 AUD|Low: $1,276 AUD|High: $2,473 AUD|Avg: $1,735 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5$1,332 AUD
Retailer 9$1,342 AUD
Retailer 4$1,346 AUD
Retailer 8$1,367 AUD
Retailer 6$1,586 AUD
Retailer 10$1,765 AUD
Retailer 2$1,912 AUD
Retailer 7$2,054 AUD
Retailer 3$2,107 AUD
MOH London$2,440 AUD

45 data points across 10 retailers

16 retailers$1,164 AUD to $2,440 AUD

B+
Cheapest Retailer
-
$1,164 AUD
Retailer 2
-
$1,332 AUD
View
Price last confirmed 17 days ago
B
Retailer 3
-
$1,336 AUD
View
B
Retailer 4
-
$1,342 AUD
View
B
Retailer 5
-
$1,346 AUD
View
Retailer 6
-
$1,367 AUD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$1,380 AUD
View
B
Retailer 8
-
$1,441 AUD
View
B
Retailer 9
-
$1,441 AUD
View
B
Retailer 10
-
$1,499 AUD
View
B
Retailer 11
-
$1,559 AUD
View
B
Retailer 12
-
$1,586 AUD
View
B
Retailer 13
-
$1,912 AUD
View
Retailer 14
-
$2,054 AUD
View
Price last confirmed 33 days ago
B
Retailer 15
-
$2,107 AUD
View
Most Expensive
B
MOH London
D98507D3B · Nov 4
$2,440 AUD
£1,320 GBP
View
15 more retailers have this diamond
Prices start from $1,164 AUDSave up to $1,276 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
$1,164 AUD