Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1509366860

Certificate GIA 1509366860

Diamond specifications and retailer prices

From $7,984 USD
As of October 31, 2026
Save $2,795 USD (26%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $10,779 USD at Yorxs · As of November 2, 2026
View at Yorxs

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 1509366860. Listed at 7 retailers as of October 31, 2026, with prices from $7,984 to $10,779, a $2,795 spread on the same certified stone. Yorxs lists it at $10,779. 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 angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1509366860
Dimensions7.32 × 7.37 × 4.61 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.32 mm7.37 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509366860
Side View
Table 59.0%Crown 35°Girdle: Slightly ThickPavilion 41.4°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: Oct 31
Current: $10,486 USD|Low: $7,880 USD|High: $10,827 USD|Avg: $9,757 USD|+1.8%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 2, 2026
Retailer 3$7,984 USD
Retailer 2$10,025 USD
Retailer 1$10,486 USD
Yorxs$10,779 USD

37 data points across 4 retailers

7 retailers$7,984 USD to $10,779 USD

B+
Cheapest Retailer
-
$7,984 USD
B+
Retailer 2
-
$8,189 USD
View
B+
Retailer 3
-
$8,701 USD
View
B
Retailer 4
-
$10,025 USD
View
Retailer 5
-
$10,025 USD
View
Price last confirmed 23 days ago
B
Retailer 6
-
$10,486 USD
£8,256 GBP
View
Most Expensive
B
Yorxs
TIM3124 · Nov 2
$10,779 USD
€10,266 EUR
View
6 more retailers have this diamond
Prices start from $7,984 USDSave up to $2,795 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
$7,984 USD