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Cushion|Natural|GIA

1.20ct K SI1 Cushion Natural Diamond

ID • K/SI1 • GIA 1555890599

Certificate GIA 1555890599

Diamond specifications and retailer prices

From $2,655 NZD
As of November 6, 2026
Save $3,574 NZD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,229 NZD at MOH London · As of November 2, 2026
View at MOH London

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 1555890599. Listed at 15 retailers as of November 2, 2026, with prices from $2,655 to $6,229, a $3,574 spread on the same certified stone. MOH London lists it at $6,229. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555890599
Dimensions7.26 × 5.39 × 3.65 mm
L/W Ratio1.35
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Cloud
Top View
7.26 mm5.39 mm1.20 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1555890599
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: $6,229 NZD|Low: $2,655 NZD|High: $6,305 NZD|Avg: $4,015 NZD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$2,655 NZD
Retailer 2$2,789 NZD
Retailer 6$3,281 NZD
Retailer 3$3,449 NZD
Retailer 10$3,555 NZD
Retailer 5$3,703 NZD
Retailer 8$3,860 NZD
Retailer 7$4,338 NZD
Retailer 4$4,829 NZD
MOH London$6,229 NZD

26 data points across 10 retailers

15 retailers$2,655 NZD to $6,229 NZD

A
Cheapest Retailer
-
$2,655 NZD
A
Retailer 2
-
$2,789 NZD
View
B+
Retailer 3
-
$3,281 NZD
View
B+
Retailer 4
-
$3,326 NZD
View
B+
Retailer 5
-
$3,328 NZD
View
B+
Retailer 6
-
$3,449 NZD
View
Retailer 7
-
$3,555 NZD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$3,644 NZD
View
B+
Retailer 9
-
$3,703 NZD
View
B+
Retailer 10
-
$3,716 NZD
View
B+
Retailer 11
-
$3,804 NZD
View
B+
Retailer 12
-
$3,860 NZD
View
B+
Retailer 13
-
$4,338 NZD
View
B
Retailer 14
-
$4,829 NZD
View
Most Expensive
B
MOH London
4A1957514 · Nov 2
$6,229 NZD
£2,719 GBP
View
14 more retailers have this diamond
Prices start from $2,655 NZDSave up to $3,574 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
$2,655 NZD