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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG770639320

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770639320

Diamond specifications and retailer prices

From $264 NZD
$148 USD
As of October 29, 2026
Save $1,567 NZD (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,831 NZD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770639320 or 770639320. Listed at 18 retailers as of October 29, 2026, with prices from $264 to $1,831, a $1,567 spread on the same certified stone. Reve Diamonds lists it at $1,831. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770639320
Dimensions6.61 × 6.63 × 4.05 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
6.61 mm6.63 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770639320
Side View
Table 59.0%Crown 34.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
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: Oct 29
Current: $639 NZD|Low: $253 NZD|High: $1,549 NZD|Avg: $717 NZD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9$264 NZD
Retailer 3$306 NZD
Retailer 11$328 NZD
Retailer 5$565 NZD
Retailer 12$604 NZD
Retailer 6$621 NZD
Retailer 1$639 NZD
Retailer 2$767 NZD
Retailer 10$908 NZD
Retailer 4$1,052 NZD
Retailer 7$1,111 NZD
Retailer 8$1,531 NZD

42 data points across 12 retailers

18 retailers$264 NZD to $1,831 NZD

A
Cheapest Retailer
-
$264 NZD
$148 USD
A
Retailer 2
-
$294 NZD
$165 USD
View
Final sale: no returns
A
Retailer 3
-
$306 NZD
$172 USD
View
A
Retailer 4
-
$328 NZD
$184 USD
View
A
Retailer 5
-
$328 NZD
$184 USD
View
A
Retailer 6
-
$550 NZD
$309 USD
View
A
Retailer 7
-
$565 NZD
£250 GBP
View
B+
Retailer 8
-
$604 NZD
$339 USD
View
B+
Retailer 9
-
$621 NZD
€332 EUR
View
A
Retailer 10
-
$639 NZD
£283 GBP
View
B+
Retailer 11
-
$767 NZD
$431 USD
View
B
Retailer 12
-
$840 NZD
$472 USD
View
B+
Retailer 13
-
$908 NZD
$510 USD
View
B
Retailer 14
-
$1,052 NZD
$591 USD
View
B
Retailer 15
-
$1,111 NZD
$624 USD
View
B
Retailer 16
-
$1,150 NZD
$646 USD
View
B
Retailer 17
-
$1,531 NZD
£677 GBP
View
Most Expensive
B
Reve Diamonds
0394E2DC1 · Oct 30
$1,831 NZD
$1,028 USD
View
17 more retailers have this diamond
Prices start from $264 NZDSave up to $1,567 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.

A
1.09ct Round
$264 NZD