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Round|Lab Grown|IGI

1.25ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG811647377

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811647377

Diamond specifications and retailer prices

From $666 AUD
$467 USD
As of November 1, 2026
Save $2,367 AUD (78%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,653 AUD at Brilliant Earth · As of October 14, 2026
View at Brilliant Earth

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811647377 or 811647377. Listed at 22 retailers as of November 1, 2026, with a 355% 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

1.25
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811647377
Dimensions6.98 × 6.95 × 4.20 mm
L/W Ratio1.00
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
6.98 mm6.95 mm1.25 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811647377
Side View
Table 59.0%Crown 33.3°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.3%

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 1
Current: $3,653 AUD|Low: $639 AUD|High: $3,753 AUD|Avg: $1,729 AUD|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 3, 2026
Retailer 4$666 AUD
Retailer 12$745 AUD
Retailer 10$746 AUD
Retailer 8$826 AUD
Retailer 19$1,027 AUD
Retailer 17$1,269 AUD
Retailer 5$1,288 AUD
Retailer 20$1,290 AUD
Retailer 13$1,310 AUD
Retailer 2$1,365 AUD
Retailer 14$1,424 AUD
Retailer 6$1,857 AUD
Retailer 16$2,013 AUD
Retailer 7$2,098 AUD
Retailer 18$2,220 AUD
Retailer 9$2,622 AUD
Retailer 11$2,654 AUD
Retailer 3$2,704 AUD
Retailer 15$3,034 AUD
Brilliant Earth$3,653 AUD

41 data points across 20 retailers

22 retailers$666 AUD to $3,034 AUD

A
Cheapest Retailer
-
$666 AUD
$467 USD
A
Retailer 2
-
$745 AUD
$522 USD
View
Final sale: no returns
A
Retailer 3
-
$746 AUD
$523 USD
View
A
Retailer 4
-
$826 AUD
$579 USD
View
Retailer 5
-
$826 AUD
$579 USD
View
Price last confirmed 21 days ago
A
Retailer 6
-
$1,027 AUD
$720 USD
View
B+
Retailer 7
-
$1,179 AUD
$826 USD
View
B+
Retailer 8
-
$1,269 AUD
View
B+
Retailer 9
-
$1,290 AUD
$904 USD
View
B+
Retailer 10
-
$1,310 AUD
£723 GBP
View
B+
Retailer 11
-
$1,365 AUD
£753 GBP
View
B+
Retailer 12
-
$1,424 AUD
ZAR 16,124 ZAR
View
Retailer 13
-
$1,857 AUD
View
Price last confirmed 26 days ago
B
Retailer 14
-
$2,013 AUD
View
Retailer 15
-
$2,098 AUD
$1,470 USD
View
Price last confirmed 27 days ago
B
Retailer 16
-
$2,220 AUD
$1,556 USD
View
Retailer 17
-
$2,622 AUD
SGD 2,483 SGD
View
Price last confirmed 21 days ago
B
Retailer 18
-
$2,654 AUD
$1,860 USD
View
Retailer 19
-
$2,698 AUD
$1,890 USD
View
Price last confirmed 21 days ago
B
Retailer 20
-
$2,704 AUD
$1,895 USD
View
B
Retailer 21
-
$3,034 AUD
£1,674 GBP
View
Most Expensive
Brilliant Earth
21369880A · Oct 14
$3,653 AUD
$2,560 USD
View
Price last confirmed 19 days ago
21 more retailers have this diamond
Prices start from $666 AUDSave up to $2,367 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
1.25ct Round
$666 AUD