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Round|Lab Grown|IGI

1.09ct D SI2 Round Lab Grown Diamond

EX • D/SI2 • IGI LG472170728

Shape and cutting style on the report: Round brilliant

Certificate IGI LG472170728

Diamond specifications and retailer prices

From $914 AUD
As of November 5, 2026
Save $1,101 AUD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,963 AUD at Friendly Diamonds · As of November 4, 2026
View at Friendly Diamonds

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG472170728 or 472170728. Listed at 11 retailers as of November 4, 2026, with a 120% 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

1.09
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG472170728
Dimensions6.51 × 6.49 × 4.13 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
6.51 mm6.49 mm1.09 ctD / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG472170728
Side View
Table 57.5%Crown 36.1°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $2,963 AUD|Low: $914 AUD|High: $4,950 AUD|Avg: $1,969 AUD
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6$914 AUD
Retailer 5$1,074 AUD
Retailer 9$1,169 AUD
Retailer 11$1,201 AUD
Retailer 3$1,246 AUD
Retailer 7$1,246 AUD
Retailer 2$1,963 AUD
Retailer 8$2,016 AUD
Friendly Diamonds$2,963 AUD
Retailer 10$3,503 AUD
Retailer 4$4,878 AUD

43 data points across 11 retailers

11 retailers$914 AUD to $2,016 AUD

B
Cheapest Retailer
-
$914 AUD
B
Retailer 2
-
$1,074 AUD
View
B
Retailer 3
-
$1,169 AUD
View
B
Retailer 4
-
$1,201 AUD
View
Final sale: no returns
Retailer 5
-
$1,246 AUD
View
Price last confirmed 25 days ago
B
Retailer 6
-
$1,246 AUD
View
B
Retailer 7
-
$1,963 AUD
View
B
Retailer 8
-
$2,016 AUD
View
Most Expensive
Friendly Diamonds
1589421 · Nov 4
$2,963 AUD
$2,074 USD
View
Price under review
8 more retailers have this diamond
Prices start from $914 AUDSave up to $1,101 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.

B
1.09ct Round
$914 AUD