Cushion|Natural|GIA

0.90ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 6512878823

Certificate GIA 6512878823

Diamond specifications and retailer prices

From $530 USD
As of November 6, 2026
Save $787 USD (60%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,317 USD at MOH London · As of November 4, 2026
View at MOH London

About this 0.9ct natural cushion diamond

This 0.9ct natural cushion sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6512878823. Listed at 8 retailers as of November 4, 2026, with prices from $530 to $1,317, a $787 spread on the same certified stone. MOH London lists it at $1,317. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.90
Carat
K
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6512878823
Dimensions5.72 × 5.71 × 3.81 mm
L/W Ratio1.00
Top View
5.72 mm5.71 mm0.90 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6512878823
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,317 USD|Low: $530 USD|High: $1,335 USD|Avg: $867 USD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 2$530 USD
Retailer 6$614 USD
Retailer 4$754 USD
Retailer 5$863 USD
Retailer 3$1,017 USD
MOH London$1,317 USD

43 data points across 6 retailers

8 retailers$530 USD to $1,317 USD

A
Cheapest Retailer
-
$530 USD
B+
Retailer 2
-
$614 USD
View
B+
Retailer 3
-
$754 USD
View
B+
Retailer 4
-
$762 USD
View
B+
Retailer 5
-
$863 USD
View
B+
Retailer 6
-
$1,015 USD
View
B+
Retailer 7
-
$1,017 USD
View
Most Expensive
B
MOH London
92853AFB3 · Nov 4
$1,317 USD
£1,037 GBP
View
7 more retailers have this diamond
Prices start from $530 USDSave up to $787 USD

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
0.90ct Cushion
$530 USD