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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 $367 AUD
$258 USD
As of October 29, 2026
Save $2,167 AUD (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,534 AUD 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 $367 to $2,534, a $2,167 spread on the same certified stone. Brilliant Earth lists it at $2,534. 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
Colour
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: $2,534 AUD|Low: $364 AUD|High: $2,975 AUD|Avg: $1,085 AUD|-14.8%
Brilliant Earth
Retailer 2
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Retailer 21
October 31, 2026
Retailer 10$367 AUD
Retailer 21$410 AUD
Retailer 5$426 AUD
Retailer 6$456 AUD
Retailer 12$456 AUD
Retailer 18$683 AUD
Retailer 15$722 AUD
Retailer 2$758 AUD
Retailer 7$762 AUD
Retailer 17$783 AUD
Retailer 8$813 AUD
Retailer 13$868 AUD
Retailer 9$1,015 AUD
Retailer 4$1,399 AUD
Retailer 14$1,465 AUD
Retailer 20$1,481 AUD
Retailer 11$1,538 AUD
Retailer 19$1,614 AUD
Retailer 16$1,837 AUD
Retailer 3$2,150 AUD
Brilliant Earth$2,534 AUD

30 data points across 21 retailers

21 retailers$367 AUD to $2,534 AUD

A
Cheapest Retailer
-
$367 AUD
$258 USD
A
Retailer 2
-
$410 AUD
$288 USD
View
Final sale: no returns
A
Retailer 3
-
$426 AUD
$299 USD
View
A
Retailer 4
-
$456 AUD
$320 USD
View
A
Retailer 5
-
$456 AUD
$320 USD
View
A
Retailer 6
-
$683 AUD
$480 USD
View
A
Retailer 7
-
$722 AUD
HK$3,962 HKD
View
A
Retailer 8
-
$758 AUD
€507 EUR
View
A
Retailer 9
-
$762 AUD
$535 USD
View
A
Retailer 10
-
$783 AUD
ZAR 8,886 ZAR
View
A
Retailer 11
-
$813 AUD
$571 USD
View
A
Retailer 12
-
$868 AUD
£480 GBP
View
B+
Retailer 13
-
$1,015 AUD
$713 USD
View
B+
Retailer 14
-
$1,399 AUD
$983 USD
View
B+
Retailer 15
-
$1,465 AUD
$1,029 USD
View
B+
Retailer 16
-
$1,481 AUD
SGD 1,406 SGD
View
B+
Retailer 17
-
$1,538 AUD
$1,080 USD
View
B+
Retailer 18
-
$1,614 AUD
$1,134 USD
View
B+
Retailer 19
-
$1,837 AUD
£1,016 GBP
View
Retailer 20
-
$2,150 AUD
$1,510 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
21422152A · Oct 29
$2,534 AUD
$1,780 USD
View
20 more retailers have this diamond
Prices start from $367 AUDSave up to $2,167 AUD

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
$367 AUD