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Cushion|Natural|GIA

1.51ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 6555094950

Certificate GIA 6555094950

Diamond specifications and retailer prices

From $7,544 AUD
HK$41,400 HKD
As of November 1, 2026
Save $7,354 AUD (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $14,898 AUD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two 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 6555094950. Listed at 18 retailers as of October 28, 2026, with prices from $7,544 to $14,898, a $7,354 spread on the same certified stone. Queensmith lists it at $14,898. 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

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555094950
Dimensions7.66 × 5.89 × 4.00 mm
L/W Ratio1.30
Top View
7.66 mm5.89 mm1.51 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555094950
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $14,898 AUD|Low: $7,489 AUD|High: $15,097 AUD|Avg: $10,621 AUD|+1.2%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 10$7,544 AUD
Retailer 7$8,041 AUD
Retailer 3$8,411 AUD
Retailer 5$8,890 AUD
Retailer 11$9,189 AUD
Retailer 6$9,548 AUD
Retailer 12$9,752 AUD
Retailer 4$9,763 AUD
Retailer 13$10,185 AUD
Retailer 2$10,876 AUD
Retailer 9$12,233 AUD
Retailer 8$14,668 AUD
Queensmith$14,898 AUD

28 data points across 13 retailers

18 retailers$7,544 AUD to $14,898 AUD

A
Cheapest Retailer
-
$7,544 AUD
HK$41,400 HKD
A
Retailer 2
-
$8,041 AUD
₹537,956 INR
View
A
Retailer 3
-
$8,411 AUD
$5,908 USD
View
Retailer 4
-
$8,664 AUD
SGD 8,224 SGD
View
Price last confirmed 18 days ago
A
Retailer 5
-
$8,890 AUD
SGD 8,439 SGD
View
A
Retailer 6
-
$9,189 AUD
$6,455 USD
View
Final sale: no returns
B+
Retailer 7
-
$9,243 AUD
$6,493 USD
View
B+
Retailer 8
-
$9,246 AUD
$6,495 USD
View
Retailer 9
-
$9,343 AUD
$6,563 USD
View
Price last confirmed 17 days ago
B+
Retailer 10
-
$9,548 AUD
£5,281 GBP
View
B+
Retailer 11
-
$9,752 AUD
$6,850 USD
View
Retailer 12
-
$9,763 AUD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
$10,185 AUD
$7,154 USD
View
B+
Retailer 14
-
$10,556 AUD
View
B+
Retailer 15
-
$10,876 AUD
€7,276 EUR
View
B+
Retailer 16
-
$12,233 AUD
ZAR 138,816 ZAR
View
B
Retailer 17
-
$14,668 AUD
£8,113 GBP
View
Most Expensive
B
Queensmith
6555094950 · Oct 28
$14,898 AUD
£8,240 GBP
View
17 more retailers have this diamond
Prices start from $7,544 AUDSave up to $7,354 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
1.51ct Cushion
$7,544 AUD