Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557621269

Certificate GIA 2557621269

Diamond specifications and retailer prices

From $4,570 USD
HK$35,700 HKD
As of November 1, 2026
Save $5,829 USD (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $10,399 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557621269. Listed at 9 retailers as of October 30, 2026, with prices from $4,570 to $10,399, a $5,829 spread on the same certified stone. NZ Jewellers lists it at $10,399. 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

1.55
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557621269
Dimensions7.30 × 7.36 × 4.59 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud, Needle
Top View
7.30 mm7.36 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557621269
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.6%

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: $10,399 USD|Low: $4,531 USD|High: $11,023 USD|Avg: $6,797 USD|-5.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 6$4,570 USD
Retailer 4$5,187 USD
Retailer 9$5,272 USD
Retailer 5$5,384 USD
Retailer 7$6,218 USD
Retailer 8$6,218 USD
Retailer 2$6,784 USD
Retailer 3$9,161 USD
NZ Jewellers$10,399 USD

39 data points across 9 retailers

9 retailers$4,570 USD to $10,399 USD

A
Cheapest Retailer
-
$4,570 USD
HK$35,700 HKD
A
Retailer 2
-
$5,187 USD
€4,940 EUR
View
A
Retailer 3
-
$5,272 USD
SGD 7,124 SGD
View
A
Retailer 4
-
$5,384 USD
View
B+
Retailer 5
-
$6,218 USD
View
B+
Retailer 6
-
$6,218 USD
View
B+
Retailer 7
-
$6,784 USD
€6,461 EUR
View
B
Retailer 8
-
$9,161 USD
£7,213 GBP
View
Most Expensive
B
NZ Jewellers
706c909f-4d06-495a-abc7-7b084a6df80a · Oct 30
$10,399 USD
View
8 more retailers have this diamond
Prices start from $4,570 USDSave up to $5,829 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
1.55ct Round
$4,570 USD