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Cushion|Natural|GIA

1.20ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6422491450

Certificate GIA 6422491450

Diamond specifications and retailer prices

From $3,521 NZD
As of November 6, 2026
Save $2,378 NZD (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,899 NZD at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6422491450. Listed at 6 retailers as of November 6, 2026, with prices from $3,521 to $5,899, a $2,378 spread on the same certified stone. Frank Darling lists it at $5,899. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6422491450
Dimensions5.98 × 5.88 × 4.16 mm
L/W Ratio1.02
Top View
5.98 mm5.88 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6422491450
Side View
Table 66.0%CrownGirdle: STH-ETHPavilionCulet: NoneDepth 70.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,899 NZD|Low: $3,521 NZD|High: $5,899 NZD|Avg: $4,346 NZD
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$3,521 NZD
Retailer 5$3,559 NZD
Retailer 6$3,572 NZD
Retailer 3$3,729 NZD
Retailer 2$5,228 NZD
Frank Darling$5,899 NZD

32 data points across 6 retailers

6 retailers$3,521 NZD to $5,899 NZD

B+
Cheapest Retailer
-
$3,521 NZD
B+
Retailer 2
-
$3,559 NZD
View
B+
Retailer 3
-
$3,572 NZD
View
B+
Retailer 4
-
$3,729 NZD
View
B
Retailer 5
-
$5,228 NZD
View
Most Expensive
B
Frank Darling
CU2547MR · Nov 6
$5,899 NZD
$3,270 USD
View
5 more retailers have this diamond
Prices start from $3,521 NZDSave up to $2,378 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.

B+
1.20ct Cushion
$3,521 NZD