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Round|Lab Grown|IGI

1.91ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG640491565

Shape and cutting style on the report: Round brilliant

Certificate IGI LG640491565

Diamond specifications and retailer prices

From $873 AUD
$613 USD
As of October 29, 2026
Save $6,643 AUD (88%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $7,516 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.91ct lab-grown round diamond

This 1.91ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG640491565 or 640491565. Listed at 24 retailers as of October 29, 2026, with prices from $873 to $7,516, a $6,643 spread on the same certified stone. Brilliant Earth lists it at $7,516. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640491565
Dimensions7.88 × 7.93 × 4.92 mm
L/W Ratio1.01
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
7.88 mm7.93 mm1.91 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640491565
Side View
Table 58.0%Crown 35.8°Girdle: MediumPavilion 41°Culet: NoneDepth 62.2%

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: Oct 29
Current: $7,516 AUD|Low: $838 AUD|High: $7,516 AUD|Avg: $2,496 AUD
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
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Retailer 17
Retailer 18
October 29, 2026
Retailer 5$873 AUD
Retailer 9$976 AUD
Retailer 8$1,082 AUD
Retailer 18$1,267 AUD
Retailer 6$1,452 AUD
Retailer 15$1,525 AUD
Retailer 11$1,636 AUD
Retailer 12$1,649 AUD
Retailer 2$1,684 AUD
Retailer 13$1,860 AUD
Retailer 16$2,536 AUD
Retailer 3$2,686 AUD
Retailer 7$2,901 AUD
Retailer 4$3,288 AUD
Retailer 10$3,576 AUD
Retailer 17$3,850 AUD
Retailer 14$4,705 AUD
Brilliant Earth$7,516 AUD

30 data points across 18 retailers

24 retailers$873 AUD to $7,516 AUD

A
Cheapest Retailer
-
$873 AUD
$613 USD
A
Retailer 2
-
$976 AUD
$686 USD
View
Final sale: no returns
A
Retailer 3
-
$978 AUD
$687 USD
View
A
Retailer 4
-
$1,082 AUD
$760 USD
View
A
Retailer 5
-
$1,082 AUD
$760 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
$1,267 AUD
$890 USD
View
A
Retailer 7
-
$1,402 AUD
$985 USD
View
A
Retailer 8
-
$1,452 AUD
$1,020 USD
View
A
Retailer 9
-
$1,525 AUD
View
A
Retailer 10
-
$1,636 AUD
£905 GBP
View
A
Retailer 11
-
$1,649 AUD
€1,103 EUR
View
A
Retailer 12
-
$1,684 AUD
£932 GBP
View
A
Retailer 13
-
$1,860 AUD
ZAR 21,114 ZAR
View
B+
Retailer 14
-
$2,040 AUD
$1,433 USD
View
B+
Retailer 15
-
$2,536 AUD
View
Price last confirmed 8 days ago
B+
Retailer 16
-
$2,686 AUD
$1,887 USD
View
B+
Retailer 17
-
$2,847 AUD
$2,000 USD
View
B+
Retailer 18
-
$2,901 AUD
View
Price last confirmed 20 days ago
B+
Retailer 19
-
$3,288 AUD
$2,310 USD
View
B
Retailer 20
-
$3,498 AUD
$2,458 USD
View
B
Retailer 21
-
$3,576 AUD
$2,512 USD
View
B+
Retailer 22
-
$3,850 AUD
$2,705 USD
View
B
Retailer 23
-
$4,705 AUD
£2,603 GBP
View
Most Expensive
B
Brilliant Earth
11460987A · Oct 29
$7,516 AUD
$5,280 USD
View
23 more retailers have this diamond
Prices start from $873 AUDSave up to $6,643 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
1.91ct Round
$873 AUD