Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2554628290

Certificate GIA 2554628290

Diamond specifications and retailer prices

From $6,527 USD
As of November 6, 2026
Save $6,003 USD (48%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $12,530 USD at NZ Jewellers · As of November 2, 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 2554628290. Listed at 10 retailers as of November 2, 2026, with prices from $6,527 to $12,530, a $6,003 spread on the same certified stone. NZ Jewellers lists it at $12,530. 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
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2554628290
Dimensions7.34 × 7.39 × 4.62 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Crystal, Feather, Needle
Top View
7.34 mm7.39 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554628290
Side View
Table 58.0%Crown 34.5°Girdle: STK-STKPavilion 41.6°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $12,530 USD|Low: $5,965 USD|High: $12,530 USD|Avg: $7,922 USD
NZ Jewellers
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 6, 2026
Retailer 3$5,965 USD
Retailer 6$6,527 USD
Retailer 13$6,538 USD
Retailer 8$6,920 USD
Retailer 9$7,492 USD
Retailer 7$7,511 USD
Retailer 11$7,607 USD
Retailer 5$8,158 USD
Retailer 12$8,387 USD
Retailer 2$8,432 USD
Retailer 4$9,500 USD
Retailer 10$10,548 USD
NZ Jewellers$12,530 USD

14 data points across 13 retailers

10 retailers$6,527 USD to $12,530 USD

Retailer 1
-
$5,965 USD
Price last confirmed 19 days ago
B+
Retailer 2
-
$6,527 USD
View
B+
Retailer 3
-
$6,920 USD
View
B+
Retailer 4
-
$7,492 USD
View
B+
Retailer 5
-
$7,511 USD
View
B
Retailer 6
-
$7,607 USD
View
B
Retailer 7
-
$8,387 USD
View
B+
Retailer 8
-
$8,432 USD
View
B
Retailer 9
-
$10,548 USD
View
Most Expensive
B
NZ Jewellers
487b5f42-6e04-4b45-8b32-98f9a897b104 · Nov 2
$12,530 USD
View
9 more retailers have this diamond
Prices start from $6,527 USDSave up to $6,003 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.

B+
1.55ct Round
$6,527 USD