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Round|Lab Grown|IGI

1.21ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG840634856

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840634856

Diamond specifications and retailer prices

From $367 AUD
$258 USD
As of October 29, 2026
Save $2,809 AUD (88%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,176 AUD at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

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 LG840634856 or 840634856. Listed at 22 retailers as of October 29, 2026, with prices from $367 to $3,176, a $2,809 spread on the same certified stone. Helzberg Diamonds lists it at $3,176. 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 angle35.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634856
Dimensions6.82 × 6.88 × 4.18 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
6.82 mm6.88 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634856
Side View
Table 57.0%Crown 35.3°Girdle: MediumPavilion 40.4°Culet: NoneDepth 61.0%

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: Oct 29
Current: $3,176 AUD|Low: $367 AUD|High: $3,176 AUD|Avg: $1,187 AUD
Helzberg Diamonds
Retailer 2
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Retailer 22
October 30, 2026
Retailer 5$367 AUD
Retailer 11$411 AUD
Retailer 20$426 AUD
Retailer 12$456 AUD
Retailer 21$456 AUD
Retailer 17$705 AUD
Retailer 14$727 AUD
Retailer 13$759 AUD
Retailer 6$762 AUD
Retailer 16$783 AUD
Retailer 10$813 AUD
Retailer 2$868 AUD
Retailer 4$1,015 AUD
Retailer 22$1,399 AUD
Retailer 9$1,465 AUD
Retailer 19$1,481 AUD
Retailer 15$1,538 AUD
Retailer 18$1,614 AUD
Retailer 8$1,837 AUD
Retailer 7$2,150 AUD
Retailer 3$2,534 AUD
Helzberg Diamonds$3,176 AUD

15 data points across 22 retailers

22 retailers$367 AUD to $3,176 AUD

A
Cheapest Retailer
-
$367 AUD
$258 USD
A
Retailer 2
-
$411 AUD
$289 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
-
$705 AUD
$495 USD
View
Retailer 7
-
$727 AUD
£402 GBP
View
Price last confirmed 13 days ago
A
Retailer 8
-
$759 AUD
€508 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
Retailer 19
-
$1,837 AUD
£1,016 GBP
View
Price last confirmed 9 days ago
Retailer 20
-
$2,150 AUD
$1,510 USD
View
Price last confirmed 9 days ago
B
Retailer 21
-
$2,534 AUD
$1,780 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJKOLM · Oct 30
$3,176 AUD
$2,231 USD
View
21 more retailers have this diamond
Prices start from $367 AUDSave up to $2,809 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