CaratHunter
Plans
Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2556664337

Certificate GIA 2556664337

Diamond specifications and retailer prices

From €4,097 EUR
HK$35,900 HKD
As of November 1, 2026
Save €4,593 EUR (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €8,690 EUR 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 €4,097 to €8,690, a €4,593 spread on the same certified stone. Queensmith lists it at €8,690. 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: €8,690 EUR|Low: €4,063 EUR|High: €8,758 EUR|Avg: €5,738 EUR|+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€4,097 EUR
Retailer 2€4,371 EUR
Retailer 13€4,567 EUR
Retailer 14€4,671 EUR
Retailer 6€4,824 EUR
Retailer 4€5,040 EUR
Retailer 7€5,109 EUR
Retailer 9€5,239 EUR
Retailer 5€5,600 EUR
Retailer 3€5,712 EUR
Retailer 8€5,964 EUR
Retailer 11€6,709 EUR
Retailer 10€8,045 EUR
Queensmith€8,690 EUR

23 data points across 14 retailers

19 retailers€4,097 EUR to €8,690 EUR

A
Cheapest Retailer
-
€4,097 EUR
HK$35,900 HKD
A
Retailer 2
-
€4,371 EUR
₹466,869 INR
View
A
Retailer 3
-
€4,567 EUR
$5,122 USD
View
A
Retailer 4
-
€4,671 EUR
SGD 7,079 SGD
View
A
Retailer 5
-
€4,824 EUR
SGD 7,312 SGD
View
B+
Retailer 6
-
€5,016 EUR
$5,626 USD
View
B+
Retailer 7
-
€5,020 EUR
$5,630 USD
View
B+
Retailer 8
-
€5,040 EUR
$5,653 USD
View
Final sale: no returns
B+
Retailer 9
-
€5,109 EUR
£4,512 GBP
View
B+
Retailer 10
-
€5,239 EUR
£4,627 GBP
View
Retailer 11
-
€5,461 EUR
A$9,424 AUD
View
Price last confirmed 29 days ago
Retailer 12
-
€5,496 EUR
$6,164 USD
View
Price last confirmed 17 days ago
B+
Retailer 13
-
€5,574 EUR
A$9,618 AUD
View
B+
Retailer 14
-
€5,600 EUR
$6,281 USD
View
B+
Retailer 15
-
€5,712 EUR
$6,407 USD
View
B+
Retailer 16
-
€5,964 EUR
View
B
Retailer 17
-
€6,709 EUR
ZAR 121,565 ZAR
View
B
Retailer 18
-
€8,045 EUR
£7,105 GBP
View
Most Expensive
B
Queensmith
2556664337 · Oct 28
€8,690 EUR
£7,675 GBP
View
18 more retailers have this diamond
Prices start from €4,097 EURSave up to €4,593 EUR

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
€4,097 EUR