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Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

ID • K/SI1 • GIA 7543767304

Certificate GIA 7543767304

Diamond specifications and retailer prices

From $8,271 NZD
As of November 5, 2026
Save $5,491 NZD (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $13,762 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two 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 7543767304. Listed at 6 retailers as of November 4, 2026, with prices from $8,271 to $13,762, a $5,491 spread on the same certified stone. MOH London lists it at $13,762. 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

1.80
Carat
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7543767304
Dimensions7.60 × 6.24 × 4.37 mm
L/W Ratio1.22
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
7.60 mm6.24 mm1.80 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7543767304
Side View
Table 61.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 70.0%

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 5
Current: $13,762 NZD|Low: $8,172 NZD|High: $13,966 NZD|Avg: $9,977 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$8,271 NZD
Retailer 3$8,531 NZD
Retailer 5$8,664 NZD
Retailer 2$9,748 NZD
Retailer 4$10,571 NZD
MOH London$13,762 NZD

45 data points across 6 retailers

6 retailers$8,271 NZD to $13,762 NZD

B+
Cheapest Retailer
-
$8,271 NZD
B+
Retailer 2
-
$8,531 NZD
View
Retailer 3
-
$8,664 NZD
View
Price last confirmed 12 days ago
B
Retailer 4
-
$9,748 NZD
View
B+
Retailer 5
-
$10,571 NZD
View
Most Expensive
B
MOH London
12A5A05EC · Nov 4
$13,762 NZD
£6,007 GBP
View
5 more retailers have this diamond
Prices start from $8,271 NZDSave up to $5,491 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+
1.80ct Cushion
$8,271 NZD