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Cushion|Natural|GIA

1.51ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 2554189099

Certificate GIA 2554189099

Diamond specifications and retailer prices

From $2,221 USD
SGD 3,001 SGD
As of October 31, 2026
Save $1,924 USD (46%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,145 USD at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

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 2554189099. Listed at 12 retailers as of October 31, 2026, with prices from $2,221 to $4,145, a $1,924 spread on the same certified stone. Helzberg Diamonds lists it at $4,145. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554189099
Dimensions6.87 × 6.11 × 4.21 mm
L/W Ratio1.12
Top View
6.87 mm6.11 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554189099
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 68.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $4,145 USD|Low: $2,221 USD|High: $4,496 USD|Avg: $3,003 USD|-7.8%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 9$2,221 USD
Retailer 7$2,371 USD
Retailer 6$2,412 USD
Retailer 4$2,595 USD
Retailer 2$2,606 USD
Retailer 12$2,626 USD
Retailer 10$2,839 USD
Retailer 8$2,860 USD
Retailer 11$2,965 USD
Retailer 5$3,402 USD
Retailer 3$4,127 USD
Helzberg Diamonds$4,145 USD

28 data points across 12 retailers

12 retailers$2,221 USD to $4,145 USD

A
Cheapest Retailer
-
$2,221 USD
SGD 3,001 SGD
A
Retailer 2
-
$2,371 USD
View
A
Retailer 3
-
$2,412 USD
View
A
Retailer 4
-
$2,595 USD
View
A
Retailer 5
-
$2,606 USD
£2,052 GBP
View
A
Retailer 6
-
$2,626 USD
SGD 3,549 SGD
View
A
Retailer 7
-
$2,839 USD
View
A
Retailer 8
-
$2,860 USD
View
A
Retailer 9
-
$2,965 USD
View
A
Retailer 10
-
$3,402 USD
View
A
Retailer 11
-
$4,127 USD
View
Most Expensive
A
Helzberg Diamonds
XZRILLKHOPGPP · Nov 1
$4,145 USD
View
11 more retailers have this diamond
Prices start from $2,221 USDSave up to $1,924 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
$2,221 USD