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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 $9,402 NZD
HK$41,400 HKD
As of November 1, 2026
Save $9,165 NZD (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,568 NZD 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 $9,402 to $18,568, a $9,165 spread on the same certified stone. Queensmith lists it at $18,568. 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: $18,568 NZD|Low: $9,334 NZD|High: $18,816 NZD|Avg: $13,235 NZD|+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$9,402 NZD
Retailer 2$10,019 NZD
Retailer 3$10,483 NZD
Retailer 5$11,080 NZD
Retailer 11$11,453 NZD
Retailer 7$11,901 NZD
Retailer 12$12,154 NZD
Retailer 4$12,168 NZD
Retailer 13$12,694 NZD
Retailer 6$13,555 NZD
Retailer 9$15,246 NZD
Retailer 8$18,282 NZD
Queensmith$18,568 NZD

28 data points across 13 retailers

18 retailers$9,402 NZD to $18,568 NZD

A
Cheapest Retailer
-
$9,402 NZD
HK$41,400 HKD
A
Retailer 2
-
$10,019 NZD
₹537,782 INR
View
A
Retailer 3
-
$10,483 NZD
$5,908 USD
View
Retailer 4
-
$10,798 NZD
SGD 8,224 SGD
View
Price last confirmed 18 days ago
A
Retailer 5
-
$11,080 NZD
SGD 8,439 SGD
View
A
Retailer 6
-
$11,453 NZD
$6,455 USD
View
Final sale: no returns
B+
Retailer 7
-
$11,521 NZD
$6,493 USD
View
B+
Retailer 8
-
$11,524 NZD
$6,495 USD
View
Retailer 9
-
$11,645 NZD
$6,563 USD
View
Price last confirmed 17 days ago
B+
Retailer 10
-
$11,901 NZD
£5,281 GBP
View
B+
Retailer 11
-
$12,154 NZD
$6,850 USD
View
Retailer 12
-
$12,168 NZD
A$10,551 AUD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
$12,694 NZD
$7,154 USD
View
B+
Retailer 14
-
$13,157 NZD
A$11,408 AUD
View
B+
Retailer 15
-
$13,555 NZD
€7,276 EUR
View
B+
Retailer 16
-
$15,246 NZD
ZAR 138,816 ZAR
View
B
Retailer 17
-
$18,282 NZD
£8,113 GBP
View
Most Expensive
B
Queensmith
6555094950 · Oct 28
$18,568 NZD
£8,240 GBP
View
17 more retailers have this diamond
Prices start from $9,402 NZDSave up to $9,165 NZD

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
$9,402 NZD