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Cushion|Natural|GIA

1.20ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 1545912378

Certificate GIA 1545912378

Diamond specifications and retailer prices

From $5,379 NZD
As of November 6, 2026
Save $6,425 NZD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,050 NZD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-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 1545912378. Listed at 19 retailers as of November 2, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1545912378
Dimensions7.28 × 5.45 × 3.69 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Needle, Pinpoint
Top View
7.28 mm5.45 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1545912378
Side View
Table 66.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 67.8%

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 6
Current: $12,050 NZD|Low: $5,332 NZD|High: $12,302 NZD|Avg: $7,784 NZD|-2.0%
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
Retailer 14
Retailer 15
November 6, 2026
Retailer 15$5,379 NZD
Retailer 2$5,592 NZD
Retailer 6$6,409 NZD
Retailer 5$6,516 NZD
Retailer 13$6,536 NZD
Retailer 4$6,738 NZD
Retailer 10$6,784 NZD
Retailer 8$6,848 NZD
Retailer 11$7,107 NZD
Retailer 3$7,322 NZD
Retailer 7$7,535 NZD
Retailer 9$7,943 NZD
Retailer 12$8,615 NZD
Retailer 14$11,805 NZD
Queensmith$12,050 NZD

23 data points across 15 retailers

19 retailers$5,379 NZD to $11,805 NZD

A
Cheapest Retailer
-
$5,379 NZD
B+
Retailer 2
-
$5,592 NZD
View
B+
Retailer 3
-
$6,409 NZD
View
B+
Retailer 4
-
$6,516 NZD
View
Final sale: no returns
B+
Retailer 5
-
$6,536 NZD
View
B+
Retailer 6
-
$6,738 NZD
View
B+
Retailer 7
-
$6,784 NZD
View
B+
Retailer 8
-
$6,819 NZD
View
B+
Retailer 9
-
$6,848 NZD
View
B+
Retailer 10
-
$7,107 NZD
View
B+
Retailer 11
-
$7,279 NZD
View
Retailer 12
-
$7,311 NZD
View
Price last confirmed 22 days ago
B+
Retailer 13
-
$7,322 NZD
View
B+
Retailer 14
-
$7,535 NZD
View
B+
Retailer 15
-
$7,943 NZD
View
Retailer 16
-
$7,959 NZD
View
Price last confirmed 34 days ago
B
Retailer 17
-
$8,615 NZD
View
B
Retailer 18
-
$11,805 NZD
View
Most Expensive
Queensmith
1545912378 · Oct 28
$12,050 NZD
£5,260 GBP
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from $5,379 NZDSave up to $6,425 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
1.20ct Cushion
$5,379 NZD