CaratHunter
Plans
Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2556191991

Certificate GIA 2556191991

Diamond specifications and retailer prices

From €4,154 EUR
HK$36,400 HKD
As of November 1, 2026
Save €4,599 EUR (53%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €8,753 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 2556191991. Listed at 18 retailers as of October 28, 2026, with prices from €4,154 to €8,753, a €4,599 spread on the same certified stone. Queensmith lists it at €8,753. 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
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556191991
Dimensions8.09 × 5.59 × 3.82 mm
L/W Ratio1.45
Top View
8.09 mm5.59 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556191991
Side View
Table 65.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 68.3%

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: €8,753 EUR|Low: €4,108 EUR|High: €8,815 EUR|Avg: €5,821 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 11€4,154 EUR
Retailer 6€4,225 EUR
Retailer 2€4,426 EUR
Retailer 13€4,625 EUR
Retailer 14€4,731 EUR
Retailer 4€4,848 EUR
Retailer 8€5,307 EUR
Retailer 12€5,532 EUR
Retailer 5€5,672 EUR
Retailer 3€5,784 EUR
Retailer 7€6,044 EUR
Retailer 10€6,797 EUR
Retailer 9€8,150 EUR
Queensmith€8,753 EUR

28 data points across 14 retailers

18 retailers€4,154 EUR to €8,753 EUR

A
Cheapest Retailer
-
€4,154 EUR
HK$36,400 HKD
A
Retailer 2
-
€4,225 EUR
SGD 6,404 SGD
View
A
Retailer 3
-
€4,426 EUR
₹472,755 INR
View
A
Retailer 4
-
€4,625 EUR
$5,187 USD
View
A
Retailer 5
-
€4,731 EUR
SGD 7,171 SGD
View
A
Retailer 6
-
€4,848 EUR
$5,437 USD
View
B+
Retailer 7
-
€5,081 EUR
$5,699 USD
View
B+
Retailer 8
-
€5,082 EUR
$5,700 USD
View
B+
Retailer 9
-
€5,307 EUR
£4,687 GBP
View
B+
Retailer 10
-
€5,532 EUR
$6,205 USD
View
Retailer 11
-
€5,533 EUR
A$9,547 AUD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
€5,667 EUR
A$9,778 AUD
View
B+
Retailer 13
-
€5,672 EUR
$6,362 USD
View
B+
Retailer 14
-
€5,784 EUR
$6,487 USD
View
B+
Retailer 15
-
€6,044 EUR
View
B+
Retailer 16
-
€6,797 EUR
ZAR 123,162 ZAR
View
B
Retailer 17
-
€8,150 EUR
£7,198 GBP
View
Most Expensive
B
Queensmith
2556191991 · Oct 28
€8,753 EUR
£7,730 GBP
View
17 more retailers have this diamond
Prices start from €4,154 EURSave up to €4,599 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
€4,154 EUR