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Round|Lab Grown|IGI

1.21ct D VS1 Round Lab Grown Diamond

ID • D/VS1 • IGI LG778645955

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645955

Diamond specifications and retailer prices

From $268 AUD
As of November 3, 2026
Save $1,380 AUD (84%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,055 AUD at Queensmith · As of October 27, 2026
View at Queensmith

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG778645955 or 778645955. Listed at 23 retailers as of November 1, 2026, with a 516% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645955
Dimensions6.91 × 6.94 × 4.15 mm
L/W Ratio1.00
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
6.91 mm6.94 mm1.21 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645955
Side View
Table 58.0%Crown 33.9°Girdle: MediumPavilion 40.5°Culet: NoneDepth 60.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: $1,071 AUD|Low: $256 AUD|High: $1,571 AUD|Avg: $751 AUD|+26.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 4, 2026
Retailer 13$268 AUD
Retailer 2$332 AUD
Retailer 3$447 AUD
Retailer 7$561 AUD
Retailer 10$573 AUD
Retailer 6$594 AUD
Retailer 8$613 AUD
Retailer 12$663 AUD
Retailer 9$809 AUD
Retailer 5$1,067 AUD
Retailer 1$1,071 AUD
Retailer 4$1,113 AUD
Retailer 11$1,551 AUD

41 data points across 13 retailers

23 retailers$268 AUD to $1,648 AUD

A
Cheapest Retailer
-
$268 AUD
A
Retailer 2
-
$299 AUD
View
Final sale: no returns
A
Retailer 3
-
$311 AUD
View
A
Retailer 4
-
$332 AUD
View
Retailer 5
-
$332 AUD
View
Price last confirmed 10 days ago
A
Retailer 6
-
$367 AUD
View
B+
Retailer 7
-
$447 AUD
View
A
Retailer 8
-
$561 AUD
View
A
Retailer 9
-
$563 AUD
View
A
Retailer 10
-
$573 AUD
View
A
Retailer 11
-
$594 AUD
View
B+
Retailer 12
-
$613 AUD
View
B+
Retailer 13
-
$663 AUD
View
B+
Retailer 14
-
$809 AUD
View
B+
Retailer 15
-
$858 AUD
View
B
Retailer 16
-
$1,067 AUD
View
Retailer 17
-
$1,071 AUD
View
B
Retailer 18
-
$1,081 AUD
View
B
Retailer 19
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$1,113 AUD
View
B
Retailer 20
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$1,144 AUD
View
B
Retailer 21
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$1,551 AUD
View
B
Retailer 22
-
$1,648 AUD
View
Most Expensive
Queensmith
LG778645955 · Oct 27
$3,055 AUD
£1,680 GBP
View
Price last confirmed 7 days ago
22 more retailers have this diamond
Prices start from $268 AUDSave up to $1,380 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
$268 AUD