CaratHunter
Plans
Cushion|Natural|GIA

1.51ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 6551533295

Certificate GIA 6551533295

Diamond specifications and retailer prices

From $3,533 USD
HK$27,600 HKD
As of November 1, 2026
Save $5,065 USD (59%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,598 USD 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551533295. Listed at 15 retailers as of October 28, 2026, with prices from $3,533 to $8,598, a $5,065 spread on the same certified stone. Queensmith lists it at $8,598. 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
H
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551533295
Dimensions7.61 × 5.86 × 4.02 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural, Natural
Top View
7.61 mm5.86 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551533295
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.6%

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: $8,598 USD|Low: $3,507 USD|High: $8,649 USD|Avg: $5,096 USD|+2.3%
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
November 2, 2026
Retailer 9$3,533 USD
Retailer 6$3,780 USD
Retailer 5$4,162 USD
Retailer 3$4,356 USD
Retailer 12$4,496 USD
Retailer 7$4,573 USD
Retailer 2$4,693 USD
Retailer 11$4,720 USD
Retailer 4$4,870 USD
Retailer 13$4,995 USD
Retailer 10$5,341 USD
Retailer 8$7,517 USD
Queensmith$8,598 USD

25 data points across 13 retailers

15 retailers$3,533 USD to $8,598 USD

A
Cheapest Retailer
-
$3,533 USD
HK$27,600 HKD
A
Retailer 2
-
$3,780 USD
₹359,999 INR
View
A
Retailer 3
-
$4,162 USD
SGD 5,624 SGD
View
B+
Retailer 4
-
$4,327 USD
View
A
Retailer 5
-
$4,356 USD
View
Final sale: no returns
B+
Retailer 6
-
$4,496 USD
SGD 6,075 SGD
View
A
Retailer 7
-
$4,573 USD
£3,601 GBP
View
B+
Retailer 8
-
$4,693 USD
£3,695 GBP
View
B+
Retailer 9
-
$4,720 USD
View
B+
Retailer 10
-
$4,848 USD
A$7,458 AUD
View
B+
Retailer 11
-
$4,870 USD
View
B+
Retailer 12
-
$4,995 USD
View
B+
Retailer 13
-
$5,341 USD
€5,087 EUR
View
B
Retailer 14
-
$7,517 USD
£5,919 GBP
View
Most Expensive
B
Queensmith
6551533295 · Oct 28
$8,598 USD
£6,770 GBP
View
14 more retailers have this diamond
Prices start from $3,533 USDSave up to $5,065 USD

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
$3,533 USD