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Round|Lab Grown|IGI

1.66ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG768621154

Shape and cutting style on the report: Round brilliant

Certificate IGI LG768621154

Diamond specifications and retailer prices

From $313 USD
As of November 1, 2026
Save $1,253 USD (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,566 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.66ct lab-grown round diamond

This 1.66ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG768621154 or 768621154. Listed at 19 retailers as of October 29, 2026, with prices from $313 to $1,566, a $1,253 spread on the same certified stone. MOH London lists it at $1,566. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768621154
Dimensions7.67 × 7.61 × 4.70 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.67 mm7.61 mm1.66 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768621154
Side View
Table 56.0%Crown 33.6°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,566 USD|Low: $301 USD|High: $1,634 USD|Avg: $807 USD|-3.1%
MOH London
Retailer 2
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Retailer 19
November 2, 2026
Retailer 19$313 USD
Retailer 3$350 USD
Retailer 7$364 USD
Retailer 5$389 USD
Retailer 18$389 USD
Retailer 17$535 USD
Retailer 13$545 USD
Retailer 15$554 USD
Retailer 9$653 USD
Retailer 2$670 USD
Retailer 12$691 USD
Retailer 14$905 USD
Retailer 10$1,012 USD
Retailer 16$1,140 USD
Retailer 6$1,249 USD
Retailer 11$1,295 USD
Retailer 4$1,493 USD
Retailer 8$1,555 USD
MOH London$1,566 USD

40 data points across 19 retailers

19 retailers$313 USD to $1,566 USD

A
Cheapest Retailer
-
$313 USD
A
Retailer 2
-
$350 USD
View
Final sale: no returns
A
Retailer 3
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$364 USD
View
A
Retailer 4
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$389 USD
View
Retailer 5
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$389 USD
View
Price last confirmed 8 days ago
A
Retailer 6
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$535 USD
View
A
Retailer 7
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$545 USD
View
Retailer 8
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$554 USD
£437 GBP
View
Price last confirmed 16 days ago
A
Retailer 9
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$653 USD
View
A
Retailer 10
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$670 USD
ZAR 10,825 ZAR
View
A
Retailer 11
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$691 USD
£544 GBP
View
A
Retailer 12
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$905 USD
A$1,393 AUD
View
B+
Retailer 13
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$1,012 USD
View
B+
Retailer 14
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$1,140 USD
View
B+
Retailer 15
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$1,249 USD
View
B+
Retailer 16
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$1,295 USD
View
B
Retailer 17
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$1,493 USD
View
B
Retailer 18
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$1,555 USD
View
Most Expensive
B+
MOH London
LG768621154 · Oct 29
$1,566 USD
£1,233 GBP
View
18 more retailers have this diamond
Prices start from $313 USDSave up to $1,253 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
1.66ct Round
$313 USD