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Cushion|Natural|GIA

1.51ct E SI1 Cushion Natural Diamond

ID • E/SI1 • GIA 6541087758

Certificate GIA 6541087758

Diamond specifications and retailer prices

From HK$41,530 HKD
As of November 6, 2026
Save HK$38,850 HKD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$81,917 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 E 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 6541087758. Listed at 19 retailers as of November 4, 2026, with a 94% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6541087758
Dimensions7.78 × 5.93 × 3.92 mm
L/W Ratio1.31
Top View
7.78 mm5.93 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6541087758
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.1%

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 6
Current: HK$81,917 HKD|Low: HK$41,131 HKD|High: HK$82,514 HKD|Avg: HK$57,350 HKD|+1.4%
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
Retailer 15
November 6, 2026
Retailer 15HK$41,530 HKD
Retailer 2HK$43,733 HKD
Retailer 3HK$46,147 HKD
Retailer 14HK$47,534 HKD
Retailer 11HK$49,093 HKD
Retailer 5HK$50,496 HKD
Retailer 13HK$50,512 HKD
Retailer 9HK$51,946 HKD
Retailer 4HK$53,091 HKD
Retailer 6HK$53,529 HKD
Retailer 7HK$55,959 HKD
Retailer 8HK$59,439 HKD
Retailer 10HK$66,743 HKD
Retailer 12HK$80,380 HKD
QueensmithHK$81,917 HKD

29 data points across 15 retailers

19 retailersHK$41,530 HKD to HK$80,380 HKD

A
Cheapest Retailer
-
HK$41,530 HKD
A
Retailer 2
-
HK$43,733 HKD
View
A
Retailer 3
-
HK$46,147 HKD
View
A
Retailer 4
-
HK$47,534 HKD
View
Retailer 5
-
HK$47,581 HKD
View
Price last confirmed 22 days ago
A
Retailer 6
-
HK$49,093 HKD
View
B+
Retailer 7
-
HK$50,496 HKD
View
Final sale: no returns
B+
Retailer 8
-
HK$50,512 HKD
View
B+
Retailer 9
-
HK$50,771 HKD
View
Retailer 10
-
HK$50,794 HKD
View
Price last confirmed 21 days ago
B+
Retailer 11
-
HK$51,946 HKD
View
Retailer 12
-
HK$53,091 HKD
View
Price last confirmed 15 days ago
B+
Retailer 13
-
HK$53,529 HKD
View
B+
Retailer 14
-
HK$54,901 HKD
View
B+
Retailer 15
-
HK$55,959 HKD
View
B+
Retailer 16
-
HK$59,439 HKD
View
B+
Retailer 17
-
HK$66,743 HKD
View
B
Retailer 18
-
HK$80,380 HKD
View
Most Expensive
Queensmith
6541087758 · Oct 28
HK$81,917 HKD
£8,230 GBP
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from HK$41,530 HKDSave up to HK$38,850 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$41,530 HKD