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Round|Lab Grown|IGI

1.21ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG811623471

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811623471

Diamond specifications and retailer prices

From $258 USD
As of October 29, 2026
Save $1,522 USD (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,780 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811623471 or 811623471. Listed at 21 retailers as of October 29, 2026, with prices from $258 to $1,780, a $1,522 spread on the same certified stone. Brilliant Earth lists it at $1,780. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811623471
Dimensions6.92 × 6.86 × 4.16 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.92 mm6.86 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811623471
Side View
Table 59.0%Crown 34°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
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: Oct 29
Current: $1,780 USD|Low: $256 USD|High: $2,090 USD|Avg: $762 USD|-14.8%
Brilliant Earth
Retailer 2
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Retailer 21
October 31, 2026
Retailer 10$258 USD
Retailer 21$288 USD
Retailer 5$299 USD
Retailer 6$320 USD
Retailer 12$320 USD
Retailer 18$480 USD
Retailer 15$507 USD
Retailer 2$532 USD
Retailer 7$535 USD
Retailer 17$550 USD
Retailer 8$571 USD
Retailer 13$610 USD
Retailer 9$713 USD
Retailer 4$983 USD
Retailer 14$1,029 USD
Retailer 20$1,040 USD
Retailer 11$1,080 USD
Retailer 19$1,134 USD
Retailer 16$1,290 USD
Retailer 3$1,510 USD
Brilliant Earth$1,780 USD

30 data points across 21 retailers

21 retailers$258 USD to $1,780 USD

A
Cheapest Retailer
-
$258 USD
A
Retailer 2
-
$288 USD
View
Final sale: no returns
A
Retailer 3
-
$299 USD
View
A
Retailer 4
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$320 USD
View
A
Retailer 5
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$320 USD
View
A
Retailer 6
-
$480 USD
View
A
Retailer 7
-
$507 USD
HK$3,962 HKD
View
A
Retailer 8
-
$532 USD
€507 EUR
View
A
Retailer 9
-
$535 USD
View
A
Retailer 10
-
$550 USD
ZAR 8,886 ZAR
View
A
Retailer 11
-
$571 USD
View
A
Retailer 12
-
$610 USD
£480 GBP
View
B+
Retailer 13
-
$713 USD
View
B+
Retailer 14
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$983 USD
View
B+
Retailer 15
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$1,029 USD
View
B+
Retailer 16
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$1,040 USD
SGD 1,406 SGD
View
B+
Retailer 17
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$1,080 USD
View
B+
Retailer 18
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$1,134 USD
View
B+
Retailer 19
-
$1,290 USD
£1,016 GBP
View
Retailer 20
-
$1,510 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21422152A · Oct 29
$1,780 USD
View
20 more retailers have this diamond
Prices start from $258 USDSave up to $1,522 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
1.21ct Round
$258 USD