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Round|Natural|IGI

1.55ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 668457801

Shape and cutting style on the report: Round brilliant

Certificate IGI 668457801

Diamond specifications and retailer prices

From $3,388 USD
As of October 30, 2026
Save $3,262 USD (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,650 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 668457801. Listed at 13 retailers as of October 30, 2026, with prices from $3,388 to $6,650, a $3,262 spread on the same certified stone. NZ Jewellers lists it at $6,650. 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
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 668457801
Dimensions7.45 × 7.52 × 4.49 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.45 mm7.52 mm1.55 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 668457801
Side View
Table 58.0%Crown 33.4°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 59.9%

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: Oct 30
Current: $4,141 USD|Low: $3,229 USD|High: $6,460 USD|Avg: $4,157 USD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 6$3,305 USD
Retailer 8$3,388 USD
Retailer 9$3,411 USD
Retailer 7$3,523 USD
Retailer 2$3,963 USD
Retailer 1$4,141 USD
Retailer 5$4,401 USD
Retailer 3$4,480 USD
Retailer 10$4,542 USD
Retailer 4$6,417 USD

40 data points across 10 retailers

13 retailers$3,388 USD to $6,650 USD

Retailer 1
-
$3,305 USD
Price last confirmed 12 days ago
A
Retailer 2
-
$3,388 USD
View
A
Retailer 3
-
$3,523 USD
View
Final sale: no returns
A
Retailer 4
-
$3,817 USD
View
A
Retailer 5
-
$3,817 USD
View
A
Retailer 6
-
$3,963 USD
View
A
Retailer 7
-
$3,964 USD
View
A
Retailer 8
-
$4,141 USD
£3,261 GBP
View
A
Retailer 9
-
$4,401 USD
£3,465 GBP
View
B+
Retailer 10
-
$4,404 USD
View
A
Retailer 11
-
$4,480 USD
€4,267 EUR
View
B+
Retailer 12
-
$6,417 USD
£5,053 GBP
View
Most Expensive
B
NZ Jewellers
e9cd51c0-6bd9-4603-b3f2-4a85b77b4a21 · Oct 30
$6,650 USD
View
12 more retailers have this diamond
Prices start from $3,388 USDSave up to $3,262 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
$3,388 USD