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Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6531188321

Certificate GIA 6531188321

Diamond specifications and retailer prices

From $7,247 USD
As of October 31, 2026
Save $9,102 USD (56%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $16,349 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 6531188321. Listed at 27 retailers as of October 30, 2026, with prices from $7,247 to $16,349, a $9,102 spread on the same certified stone. NZ Jewellers lists it at $16,349. 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 angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6531188321
Dimensions7.36 × 7.34 × 4.56 mm
L/W Ratio1.00
Top View
7.36 mm7.34 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531188321
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.1%

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: $10,116 USD|Low: $7,247 USD|High: $13,787 USD|Avg: $10,062 USD|+3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 7$7,247 USD
Retailer 6$7,843 USD
Retailer 3$8,991 USD
Retailer 5$9,032 USD
Retailer 1$10,116 USD
Retailer 8$10,761 USD
Retailer 4$12,009 USD
Retailer 2$13,623 USD

44 data points across 8 retailers

27 retailers$7,247 USD to $16,349 USD

B+
Cheapest Retailer
-
$7,247 USD
B+
Retailer 2
-
$7,412 USD
View
B+
Retailer 3
-
$7,636 USD
A$11,748 AUD
View
B+
Retailer 4
-
$7,653 USD
View
B+
Retailer 5
-
$7,843 USD
View
Final sale: no returns
B+
Retailer 6
-
$7,873 USD
View
B+
Retailer 7
-
$8,034 USD
CA$11,158 CAD
View
B+
Retailer 8
-
$8,135 USD
View
B+
Retailer 9
-
$8,174 USD
View
B
Retailer 10
-
$8,712 USD
View
B
Retailer 11
-
$8,856 USD
View
B+
Retailer 12
-
$8,991 USD
£7,080 GBP
View
B
Retailer 13
-
$8,992 USD
View
Retailer 14
-
$9,032 USD
A$13,895 AUD
View
Price last confirmed 8 days ago
B
Retailer 15
-
$9,072 USD
View
B
Retailer 16
-
$9,396 USD
View
B
Retailer 17
-
$9,690 USD
View
B
Retailer 18
-
$9,690 USD
View
B
Retailer 19
-
$9,908 USD
View
B
Retailer 20
-
$10,010 USD
View
B
Retailer 21
-
$10,116 USD
€9,634 EUR
View
B
Retailer 22
-
$10,218 USD
View
B
Retailer 23
-
$10,434 USD
View
Retailer 24
-
$10,761 USD
View
Price last confirmed 9 days ago
B
Retailer 25
-
$12,009 USD
ZAR 194,004 ZAR
View
B
Retailer 26
-
$13,623 USD
£10,727 GBP
View
Most Expensive
B
NZ Jewellers
bad8d0d6-c1c9-4c6b-977e-f24c51c588e1 · Oct 30
$16,349 USD
View
26 more retailers have this diamond
Prices start from $7,247 USDSave up to $9,102 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
$7,247 USD