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Round|Lab Grown|IGI

1.31ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG771657198

Shape and cutting style on the report: Round brilliant

Certificate IGI LG771657198

Diamond specifications and retailer prices

From $381 AUD
As of November 6, 2026
Save $492 AUD (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,537 AUD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG771657198 or 771657198. Listed at 17 retailers as of November 5, 2026, with a 129% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.31
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771657198
Dimensions7.05 × 7.02 × 4.33 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.05 mm7.02 mm1.31 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771657198
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.6%

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: Nov 6
Current: $485 AUD|Low: $223 AUD|High: $1,692 AUD|Avg: $702 AUD|-18.2%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Reve Diamonds
November 6, 2026
Retailer 6$228 AUD
Retailer 7$255 AUD
Retailer 15$265 AUD
Retailer 5$284 AUD
Retailer 9$381 AUD
Retailer 1$485 AUD
Retailer 16$493 AUD
Retailer 17$498 AUD
Retailer 14$626 AUD
Retailer 12$720 AUD
Retailer 13$754 AUD
Retailer 11$757 AUD
Retailer 4$763 AUD
Retailer 10$873 AUD
Retailer 3$911 AUD
Retailer 8$990 AUD
Retailer 2$1,324 AUD
Reve Diamonds$1,537 AUD

39 data points across 18 retailers

17 retailers$381 AUD to $873 AUD

Retailer 1
-
$228 AUD
Price last confirmed 12 days ago
Retailer 2
-
$265 AUD
View
Price last confirmed 8 days ago
Retailer 3
-
$284 AUD
View
Price last confirmed 11 days ago
B+
Retailer 4
-
$381 AUD
View
A
Retailer 5
-
$485 AUD
View
Retailer 6
-
$493 AUD
View
Price last confirmed 10 days ago
A
Retailer 7
-
$626 AUD
View
Retailer 8
-
$706 AUD
View
Price last confirmed 17 days ago
A
Retailer 9
-
$720 AUD
View
B+
Retailer 10
-
$754 AUD
View
B+
Retailer 11
-
$757 AUD
View
Retailer 12
-
$763 AUD
View
Price last confirmed 12 days ago
B+
Retailer 13
-
$873 AUD
View
Retailer 14
-
$911 AUD
View
Price last confirmed 14 days ago
Retailer 15
-
$990 AUD
View
Price last confirmed 11 days ago
Retailer 16
-
$1,324 AUD
View
Price last confirmed 12 days ago
Most Expensive
Reve Diamonds
1E17ECC5F · Oct 25
$1,537 AUD
$1,056 USD
View
Price last confirmed 12 days ago
16 more retailers have this diamond
Prices start from $381 AUDSave up to $492 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
1.31ct Round
$381 AUD