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Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2556664337

Certificate GIA 2556664337

Diamond specifications and retailer prices

From $4,595 USD
HK$35,900 HKD
As of November 1, 2026
Save $5,152 USD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $9,747 USD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556664337. Listed at 19 retailers as of October 28, 2026, with prices from $4,595 to $9,747, a $5,152 spread on the same certified stone. Queensmith lists it at $9,747. 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
F
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556664337
Dimensions7.67 × 5.90 × 4.08 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.67 mm5.90 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556664337
Side View
Table 70.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 69.2%

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 1
Current: $9,747 USD|Low: $4,557 USD|High: $9,823 USD|Avg: $6,435 USD|+1.9%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 12$4,595 USD
Retailer 2$4,902 USD
Retailer 13$5,122 USD
Retailer 14$5,238 USD
Retailer 6$5,411 USD
Retailer 4$5,653 USD
Retailer 7$5,730 USD
Retailer 9$5,876 USD
Retailer 5$6,281 USD
Retailer 3$6,407 USD
Retailer 8$6,690 USD
Retailer 11$7,525 USD
Retailer 10$9,023 USD
Queensmith$9,747 USD

23 data points across 14 retailers

19 retailers$4,595 USD to $9,747 USD

A
Cheapest Retailer
-
$4,595 USD
HK$35,900 HKD
A
Retailer 2
-
$4,902 USD
₹466,869 INR
View
A
Retailer 3
-
$5,122 USD
View
A
Retailer 4
-
$5,238 USD
SGD 7,079 SGD
View
A
Retailer 5
-
$5,411 USD
SGD 7,312 SGD
View
B+
Retailer 6
-
$5,626 USD
View
B+
Retailer 7
-
$5,630 USD
View
B+
Retailer 8
-
$5,653 USD
View
Final sale: no returns
B+
Retailer 9
-
$5,730 USD
£4,512 GBP
View
B+
Retailer 10
-
$5,876 USD
£4,627 GBP
View
Retailer 11
-
$6,126 USD
A$9,424 AUD
View
Price last confirmed 29 days ago
Retailer 12
-
$6,164 USD
View
Price last confirmed 17 days ago
B+
Retailer 13
-
$6,252 USD
A$9,618 AUD
View
B+
Retailer 14
-
$6,281 USD
View
B+
Retailer 15
-
$6,407 USD
View
B+
Retailer 16
-
$6,690 USD
€6,371 EUR
View
B
Retailer 17
-
$7,525 USD
ZAR 121,565 ZAR
View
B
Retailer 18
-
$9,023 USD
£7,105 GBP
View
Most Expensive
B
Queensmith
2556664337 · Oct 28
$9,747 USD
£7,675 GBP
View
18 more retailers have this diamond
Prices start from $4,595 USDSave up to $5,152 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
$4,595 USD