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Round|Lab Grown|IGI

1.09ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG687544568

Shape and cutting style on the report: Round brilliant

Certificate IGI LG687544568

Diamond specifications and retailer prices

From £114 GBP
$153 USD
As of October 29, 2026
Save £664 GBP (85%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £778 GBP 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG687544568 or 687544568. Listed at 20 retailers as of October 29, 2026, with prices from £114 to £778, a £664 spread on the same certified stone. Reve Diamonds lists it at £778. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG687544568
Dimensions6.63 × 6.59 × 4.01 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
6.63 mm6.59 mm1.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG687544568
Side View
Table 59.0%Crown 34.5°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.7%

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: Oct 29
Current: £515 GBP|Low: £90 GBP|High: £778 GBP|Avg: £348 GBP|-20.7%
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
Reve Diamonds
October 30, 2026
Retailer 5£114 GBP
Retailer 3£128 GBP
Retailer 13£141 GBP
Retailer 15£141 GBP
Retailer 11£235 GBP
Retailer 8£246 GBP
Retailer 14£258 GBP
Retailer 10£276 GBP
Retailer 7£317 GBP
Retailer 12£325 GBP
Retailer 2£384 GBP
Retailer 6£455 GBP
Retailer 4£496 GBP
Retailer 1£515 GBP
Retailer 9£664 GBP
Reve Diamonds£778 GBP

44 data points across 16 retailers

20 retailers£114 GBP to £778 GBP

Retailer 1
-
£113 GBP
$151 USD
Price last confirmed 38 days ago
A
Retailer 2
-
£114 GBP
$153 USD
View
A
Retailer 3
-
£128 GBP
$171 USD
View
Final sale: no returns
Retailer 4
-
£131 GBP
$176 USD
View
Price last confirmed 38 days ago
Retailer 5
-
£138 GBP
$185 USD
View
Price last confirmed 38 days ago
A
Retailer 6
-
£141 GBP
$189 USD
View
A
Retailer 7
-
£141 GBP
$189 USD
View
A
Retailer 8
-
£235 GBP
$315 USD
View
A
Retailer 9
-
£246 GBP
View
B+
Retailer 10
-
£258 GBP
$346 USD
View
B+
Retailer 11
-
£276 GBP
€352 EUR
View
Retailer 12
-
£317 GBP
$425 USD
View
Price last confirmed 23 days ago
B+
Retailer 13
-
£325 GBP
$436 USD
View
B+
Retailer 14
-
£384 GBP
$515 USD
View
Retailer 15
-
£451 GBP
$604 USD
View
Price last confirmed 39 days ago
B
Retailer 16
-
£455 GBP
$609 USD
View
B
Retailer 17
-
£496 GBP
$664 USD
View
B
Retailer 18
-
£515 GBP
$690 USD
View
B
Retailer 19
-
£664 GBP
View
Most Expensive
B
Reve Diamonds
86D768652 · Oct 30
£778 GBP
$1,043 USD
View
19 more retailers have this diamond
Prices start from £114 GBPSave up to £664 GBP

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
£114 GBP