CaratHunter
Plans
Cushion|Natural|GIA

1.51ct K SI2 Cushion Natural Diamond

GD • K/SI2 • GIA 6562373069

Certificate GIA 6562373069

Diamond specifications and retailer prices

From $2,406 USD
As of November 6, 2026
Save $1,013 USD (30%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,419 USD at Blue Nile · As of October 31, 2026
View at Blue Nile

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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6562373069. Listed at 6 retailers as of October 31, 2026, with prices from $2,406 to $3,419, a $1,013 spread on the same certified stone. Blue Nile lists it at $3,419. 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

1.51
Carat
K
Color
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6562373069
Dimensions7.77 × 5.89 × 3.98 mm
L/W Ratio1.32
Top View
7.77 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6562373069
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.5%

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: $3,419 USD|Low: $2,380 USD|High: $3,711 USD|Avg: $2,954 USD|-1.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3$2,406 USD
Retailer 2$2,431 USD
Retailer 6$2,775 USD
Retailer 5$3,015 USD
Retailer 4$3,341 USD
Blue Nile$3,419 USD

42 data points across 6 retailers

6 retailers$2,406 USD to $3,419 USD

A
Cheapest Retailer
-
$2,406 USD
A
Retailer 2
-
$2,431 USD
View
Retailer 3
-
$2,775 USD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$3,015 USD
View
Retailer 5
-
$3,341 USD
View
Price last confirmed 10 days ago
Most Expensive
B+
Blue Nile
30380905 · Oct 31
$3,419 USD
View
5 more retailers have this diamond
Prices start from $2,406 USDSave up to $1,013 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
1.51ct Cushion
$2,406 USD