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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 HK$36,054 HKD
As of November 1, 2026
Save HK$40,423 HKD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$76,478 HKD 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 HK$36,054 to HK$76,478, a HK$40,423 spread on the same certified stone. Queensmith lists it at HK$76,478. 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
Colour
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: HK$76,478 HKD|Low: HK$35,753 HKD|High: HK$77,076 HKD|Avg: HK$50,116 HKD|+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 3, 2026
Retailer 12HK$36,054 HKD
Retailer 7HK$38,463 HKD
Retailer 13HK$40,188 HKD
Retailer 14HK$41,101 HKD
Retailer 6HK$42,454 HKD
Retailer 4HK$44,354 HKD
Retailer 8HK$44,958 HKD
Retailer 2HK$46,102 HKD
Retailer 5HK$49,283 HKD
Retailer 3HK$50,270 HKD
Retailer 9HK$52,487 HKD
Retailer 11HK$59,041 HKD
Retailer 10HK$70,798 HKD
QueensmithHK$76,478 HKD

24 data points across 14 retailers

19 retailersHK$36,054 HKD to HK$76,478 HKD

A
Cheapest Retailer
-
HK$36,054 HKD
A
Retailer 2
-
HK$38,463 HKD
₹466,869 INR
View
A
Retailer 3
-
HK$40,188 HKD
$5,122 USD
View
Retailer 4
-
HK$41,101 HKD
SGD 7,079 SGD
View
Price last confirmed 7 days ago
A
Retailer 5
-
HK$42,454 HKD
SGD 7,312 SGD
View
B+
Retailer 6
-
HK$44,142 HKD
$5,626 USD
View
B+
Retailer 7
-
HK$44,174 HKD
$5,630 USD
View
B+
Retailer 8
-
HK$44,354 HKD
$5,653 USD
View
Final sale: no returns
B+
Retailer 9
-
HK$44,958 HKD
£4,512 GBP
View
B+
Retailer 10
-
HK$46,102 HKD
£4,627 GBP
View
Retailer 11
-
HK$48,062 HKD
A$9,424 AUD
View
Price last confirmed 30 days ago
Retailer 12
-
HK$48,363 HKD
$6,164 USD
View
Price last confirmed 18 days ago
B+
Retailer 13
-
HK$49,051 HKD
A$9,618 AUD
View
B+
Retailer 14
-
HK$49,283 HKD
$6,281 USD
View
B+
Retailer 15
-
HK$50,270 HKD
$6,407 USD
View
B+
Retailer 16
-
HK$52,487 HKD
€6,371 EUR
View
B
Retailer 17
-
HK$59,041 HKD
ZAR 121,565 ZAR
View
B
Retailer 18
-
HK$70,798 HKD
£7,105 GBP
View
Most Expensive
B
Queensmith
2556664337 · Oct 28
HK$76,478 HKD
£7,675 GBP
View
18 more retailers have this diamond
Prices start from HK$36,054 HKDSave up to HK$40,423 HKD

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
HK$36,054 HKD