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Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2556191991

Certificate GIA 2556191991

Diamond specifications and retailer prices

From HK$36,557 HKD
As of November 1, 2026
Save HK$40,469 HKD (53%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: HK$77,026 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 2556191991. Listed at 18 retailers as of October 28, 2026, with prices from HK$36,557 to HK$77,026, a HK$40,469 spread on the same certified stone. Queensmith lists it at HK$77,026. 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
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: HK$77,026 HKD|Low: HK$36,155 HKD|High: HK$77,574 HKD|Avg: HK$51,166 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 11HK$36,557 HKD
Retailer 6HK$37,182 HKD
Retailer 7HK$38,947 HKD
Retailer 13HK$40,698 HKD
Retailer 14HK$41,636 HKD
Retailer 4HK$42,659 HKD
Retailer 2HK$46,706 HKD
Retailer 12HK$48,685 HKD
Retailer 5HK$49,918 HKD
Retailer 3HK$50,898 HKD
Retailer 8HK$53,187 HKD
Retailer 10HK$59,817 HKD
Retailer 9HK$71,725 HKD
QueensmithHK$77,026 HKD

29 data points across 14 retailers

18 retailersHK$36,557 HKD to HK$77,026 HKD

A
Cheapest Retailer
-
HK$36,557 HKD
A
Retailer 2
-
HK$37,182 HKD
SGD 6,404 SGD
View
A
Retailer 3
-
HK$38,947 HKD
₹472,755 INR
View
A
Retailer 4
-
HK$40,698 HKD
$5,187 USD
View
Retailer 5
-
HK$41,636 HKD
SGD 7,171 SGD
View
Price last confirmed 7 days ago
A
Retailer 6
-
HK$42,659 HKD
$5,437 USD
View
B+
Retailer 7
-
HK$44,715 HKD
$5,699 USD
View
B+
Retailer 8
-
HK$44,723 HKD
$5,700 USD
View
B+
Retailer 9
-
HK$46,706 HKD
£4,687 GBP
View
B+
Retailer 10
-
HK$48,685 HKD
$6,205 USD
View
Retailer 11
-
HK$48,689 HKD
A$9,547 AUD
View
Price last confirmed 30 days ago
B+
Retailer 12
-
HK$49,867 HKD
A$9,778 AUD
View
B+
Retailer 13
-
HK$49,918 HKD
$6,362 USD
View
B+
Retailer 14
-
HK$50,898 HKD
$6,487 USD
View
B+
Retailer 15
-
HK$53,187 HKD
€6,456 EUR
View
B+
Retailer 16
-
HK$59,817 HKD
ZAR 123,162 ZAR
View
B
Retailer 17
-
HK$71,725 HKD
£7,198 GBP
View
Most Expensive
B
Queensmith
2556191991 · Oct 28
HK$77,026 HKD
£7,730 GBP
View
17 more retailers have this diamond
Prices start from HK$36,557 HKDSave up to HK$40,469 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$36,557 HKD