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Cushion|Natural|GIA

0.51ct H SI1 Cushion Natural Diamond

GD • H/SI1 • GIA 2537508439

Certificate GIA 2537508439

Diamond specifications and retailer prices

From $520 AUD
As of November 6, 2026
Save $149 AUD (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $668 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2537508439. Listed at 4 retailers as of November 6, 2026, with prices from $520 to $668, a $149 spread on the same certified stone. 77 Diamonds lists it at $668. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2537508439
Dimensions4.63 × 4.42 × 2.95 mm
L/W Ratio1.05
Top View
4.63 mm4.42 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537508439
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $668 AUD|Low: $431 AUD|High: $712 AUD|Avg: $582 AUD|-4.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2$492 AUD
Retailer 5$520 AUD
Retailer 3$584 AUD
Retailer 4$636 AUD
77 Diamonds$668 AUD

40 data points across 5 retailers

4 retailers$520 AUD to $668 AUD

A
Cheapest Retailer
-
$520 AUD
Retailer 2
-
$584 AUD
View
Price last confirmed 11 days ago
Retailer 3
-
$636 AUD
View
Price last confirmed 10 days ago
Most Expensive
B+
77 Diamonds
CUSCPFY7KRDR3 · Nov 6
$668 AUD
£362 GBP
View
3 more retailers have this diamond
Prices start from $520 AUDSave up to $149 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.

A
0.51ct Cushion
$520 AUD