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Round|Lab Grown|IGI

1.09ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG775620770

Shape and cutting style on the report: Round brilliant

Certificate IGI LG775620770

Diamond specifications and retailer prices

From $143 USD
As of October 26, 2026
Save $689 USD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $832 USD at MOH London · As of October 26, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG775620770 or 775620770. Listed at 17 retailers as of October 26, 2026, with prices from $143 to $832, a $689 spread on the same certified stone. MOH London lists it at $832. 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

1.09
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775620770
Dimensions6.59 × 6.64 × 4.05 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.59 mm6.64 mm1.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG775620770
Side View
Table 57.0%Crown 33.7°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 26
Current: $832 USD|Low: $143 USD|High: $889 USD|Avg: $393 USD|-5.3%
MOH London
Retailer 2
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Retailer 4
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Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
October 31, 2026
Retailer 4$143 USD
Retailer 17$160 USD
Retailer 16$166 USD
Retailer 3$178 USD
Retailer 14$205 USD
Retailer 2$302 USD
Retailer 13$303 USD
Retailer 15$321 USD
Retailer 5$331 USD
Retailer 8$371 USD
Retailer 7$426 USD
Retailer 9$430 USD
Retailer 10$442 USD
Retailer 12$485 USD
Retailer 11$520 USD
Retailer 6$571 USD
MOH London$832 USD

40 data points across 17 retailers

17 retailers$143 USD to $832 USD

A
Cheapest Retailer
-
$143 USD
A
Retailer 2
-
$166 USD
View
Retailer 3
-
$178 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$205 USD
HK$1,600 HKD
View
A
Retailer 5
-
$302 USD
€288 EUR
View
A
Retailer 6
-
$303 USD
£238 GBP
View
A
Retailer 7
-
$321 USD
View
B+
Retailer 8
-
$331 USD
View
Retailer 9
-
$371 USD
£292 GBP
View
Price last confirmed 15 days ago
B+
Retailer 10
-
$426 USD
View
Retailer 11
-
$430 USD
View
Price last confirmed 24 days ago
B+
Retailer 12
-
$442 USD
View
B+
Retailer 13
-
$467 USD
A$718 AUD
View
B+
Retailer 14
-
$485 USD
SGD 655 SGD
View
B+
Retailer 15
-
$520 USD
View
Retailer 16
-
$571 USD
View
Price last confirmed 7 days ago
Most Expensive
B
MOH London
LG775620770 · Oct 26
$832 USD
£655 GBP
View
16 more retailers have this diamond
Prices start from $143 USDSave up to $689 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
1.09ct Round
$143 USD