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Cushion|Natural|GIA

0.51ct E SI2 Cushion Natural Diamond

GD • E/SI2 • GIA 1299073936

Certificate GIA 1299073936

Diamond specifications and retailer prices

From $1,211 AUD
$851 USD
As of October 28, 2026
Save $711 AUD (37%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,922 AUD at 77 Diamonds · As of October 30, 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 E colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1299073936. Listed at 9 retailers as of October 28, 2026, with prices from $1,211 to $1,922, a $711 spread on the same certified stone. 77 Diamonds lists it at $1,922. 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
E
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1299073936
Dimensions4.75 × 4.59 × 3.10 mm
L/W Ratio1.03
Culet sizeNone
Top View
4.75 mm4.59 mm0.51 ctE / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1299073936
Side View
Table 66.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $1,922 AUD|Low: $1,211 AUD|High: $1,980 AUD|Avg: $1,488 AUD|+2.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 6$1,211 AUD
Retailer 2$1,217 AUD
Retailer 5$1,263 AUD
Retailer 4$1,291 AUD
Retailer 7$1,405 AUD
Retailer 3$1,444 AUD
Retailer 8$1,552 AUD
Retailer 9$1,552 AUD
77 Diamonds$1,922 AUD
Retailer 10$1,980 AUD

36 data points across 10 retailers

9 retailers$1,211 AUD to $1,922 AUD

B
Cheapest Retailer
-
$1,211 AUD
$851 USD
B
Retailer 2
-
$1,263 AUD
$887 USD
View
B
Retailer 3
-
$1,291 AUD
$907 USD
View
B
Retailer 4
-
$1,405 AUD
$987 USD
View
B
Retailer 5
-
$1,444 AUD
$1,014 USD
View
B
Retailer 6
-
$1,552 AUD
$1,090 USD
View
B
Retailer 7
-
$1,552 AUD
$1,090 USD
View
B
Retailer 8
-
$1,609 AUD
$1,130 USD
View
Most Expensive
C
77 Diamonds
CUSZBKWDVSAU · Oct 30
$1,922 AUD
£1,063 GBP
View
8 more retailers have this diamond
Prices start from $1,211 AUDSave up to $711 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
$1,211 AUD