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Round|Lab Grown|IGI

1.00ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451057017

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057017

Diamond specifications and retailer prices

From $580 USD
As of October 30, 2026
Save $3,597 USD (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,177 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057017 or 451057017. Listed at 12 retailers as of October 29, 2026, with prices from $580 to $4,177, a $3,597 spread on the same certified stone. MOH London lists it at $4,177. 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

1.00
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057017
Dimensions6.38 × 6.41 × 3.94 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.38 mm6.41 mm1.00 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057017
Side View
Table 54.0%Crown 32.8°Girdle: UNDPavilion 40.3°Culet: NoneDepth 61.5%

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: $4,177 USD|Low: $580 USD|High: $4,211 USD|Avg: $1,971 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2$580 USD
Retailer 6$1,115 USD
Retailer 10$1,213 USD
Retailer 9$1,247 USD
Retailer 7$1,293 USD
Retailer 11$1,465 USD
Retailer 12$1,830 USD
Retailer 8$2,057 USD
Retailer 5$2,217 USD
Retailer 3$2,623 USD
Retailer 4$3,703 USD
MOH London$4,177 USD

19 data points across 12 retailers

12 retailers$580 USD to $4,177 USD

A
Cheapest Retailer
-
$580 USD
B+
Retailer 2
-
$1,115 USD
View
B+
Retailer 3
-
$1,213 USD
View
B+
Retailer 4
-
$1,247 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,293 USD
View
Retailer 6
-
$1,293 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
$1,465 USD
View
B
Retailer 8
-
$2,057 USD
View
B
Retailer 9
-
$2,217 USD
€2,111 EUR
View
B
Retailer 10
-
$2,424 USD
View
B
Retailer 11
-
$2,623 USD
View
Most Expensive
B
MOH London
LG451057017 · Oct 29
$4,177 USD
£3,289 GBP
View
11 more retailers have this diamond
Prices start from $580 USDSave up to $3,597 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
1.00ct Round
$580 USD