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Cushion|Natural|GIA

3.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 2185885588

Certificate GIA 2185885588

Diamond specifications and retailer prices

From $60,518 AUD
As of November 6, 2026
Save $14,946 AUD (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $75,465 AUD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 3.51ct natural cushion diamond

This 3.51ct natural cushion sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2185885588. Listed at 3 retailers as of November 6, 2026, with prices from $60,518 to $75,465, a $14,946 spread on the same certified stone. 77 Diamonds lists it at $75,465. 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

3.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2185885588
Dimensions8.34 × 8.34 × 5.72 mm
L/W Ratio1.00
Top View
8.34 mm8.34 mm3.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2185885588
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.5%

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 6
Current: $75,465 AUD|Low: $60,518 AUD|High: $76,989 AUD|Avg: $66,977 AUD|-0.8%
77 Diamonds
Retailer 2
Retailer 3
November 7, 2026
Retailer 2$60,518 AUD
Retailer 3$64,011 AUD
77 Diamonds$75,465 AUD

36 data points across 3 retailers

3 retailers$60,518 AUD to $75,465 AUD

B+
Cheapest Retailer
-
$60,518 AUD
B
Retailer 2
-
$64,011 AUD
View
Most Expensive
B
77 Diamonds
CUSZHHY5DXDP · Nov 7
$75,465 AUD
£40,828 GBP
View
2 more retailers have this diamond
Prices start from $60,518 AUDSave up to $14,946 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+
3.51ct Cushion
$60,518 AUD