Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1343477968

Certificate GIA 1343477968

Diamond specifications and retailer prices

From $4,711 USD
As of November 6, 2026
Save $4,485 USD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,196 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct 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 1343477968. Listed at 15 retailers as of November 4, 2026, with prices from $4,711 to $9,196, a $4,485 spread on the same certified stone. MOH London lists it at $9,196. 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

1.51
Carat
K
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1343477968
Dimensions6.60 × 6.58 × 4.43 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.60 mm6.58 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1343477968
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.3%

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: $9,196 USD|Low: $4,711 USD|High: $9,332 USD|Avg: $6,193 USD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8$4,711 USD
Retailer 5$4,800 USD
Retailer 9$5,300 USD
Retailer 6$5,670 USD
Retailer 7$5,929 USD
Retailer 3$5,945 USD
Retailer 2$6,438 USD
Retailer 4$7,636 USD
MOH London$9,196 USD

44 data points across 9 retailers

15 retailers$4,711 USD to $9,196 USD

B
Cheapest Retailer
-
$4,711 USD
Retailer 2
-
$4,800 USD
View
Price last confirmed 10 days ago
B+
Retailer 3
-
$4,889 USD
View
B+
Retailer 4
-
$4,945 USD
View
B+
Retailer 5
-
$5,008 USD
View
B
Retailer 6
-
$5,278 USD
View
B
Retailer 7
-
$5,300 USD
View
Retailer 8
-
$5,670 USD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$5,929 USD
View
B
Retailer 10
-
$5,945 USD
View
B
Retailer 11
-
$5,977 USD
View
B
Retailer 12
-
$6,438 USD
View
Retailer 13
-
$6,903 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$7,636 USD
View
Most Expensive
B
MOH London
5FC1F0D5D · Nov 4
$9,196 USD
£7,241 GBP
View
14 more retailers have this diamond
Prices start from $4,711 USDSave up to $4,485 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.

B+
1.51ct Cushion
$4,711 USD