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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 $1,138 NZD
As of November 5, 2026
Save $1,372 NZD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,689 NZD 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

How it works →
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: $3,689 NZD|Low: $1,138 NZD|High: $6,164 NZD|Avg: $2,452 NZD
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$1,138 NZD
Retailer 5$1,338 NZD
Retailer 9$1,455 NZD
Retailer 11$1,496 NZD
Retailer 3$1,551 NZD
Retailer 7$1,551 NZD
Retailer 2$2,444 NZD
Retailer 8$2,510 NZD
Friendly Diamonds$3,689 NZD
Retailer 10$4,362 NZD
Retailer 4$6,075 NZD

43 data points across 11 retailers

11 retailers$1,138 NZD to $2,510 NZD

B
Cheapest Retailer
-
$1,138 NZD
B
Retailer 2
-
$1,338 NZD
View
B
Retailer 3
-
$1,455 NZD
View
B
Retailer 4
-
$1,496 NZD
View
Final sale: no returns
Retailer 5
-
$1,551 NZD
View
Price last confirmed 25 days ago
B
Retailer 6
-
$1,551 NZD
View
B
Retailer 7
-
$2,444 NZD
View
B
Retailer 8
-
$2,510 NZD
View
Most Expensive
Friendly Diamonds
1589421 · Nov 4
$3,689 NZD
$2,074 USD
View
Price under review
8 more retailers have this diamond
Prices start from $1,138 NZDSave up to $1,372 NZD

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
$1,138 NZD