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Round|Lab Grown|IGI

0.99ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG704591541

Shape and cutting style on the report: Round brilliant

Certificate IGI LG704591541

Diamond specifications and retailer prices

From £123 GBP
$164 USD
As of October 29, 2026
Save £687 GBP (85%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £810 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 0.99ct lab-grown round diamond

This 0.99ct lab-grown round sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG704591541 or 704591541. Listed at 20 retailers as of October 29, 2026, with prices from £123 to £810, a £687 spread on the same certified stone. Reve Diamonds lists it at £810. 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

0.99
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG704591541
Dimensions6.48 × 6.44 × 3.90 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
6.48 mm6.44 mm0.99 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG704591541
Side View
Table 60.0%Crown 32.9°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.3%

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: £137 GBP|Low: £97 GBP|High: £810 GBP|Avg: £356 GBP|+41.9%
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
Reve Diamonds
October 30, 2026
Retailer 10£123 GBP
Retailer 1£137 GBP
Retailer 11£143 GBP
Retailer 4£152 GBP
Retailer 13£222 GBP
Retailer 7£269 GBP
Retailer 3£275 GBP
Retailer 14£285 GBP
Retailer 8£296 GBP
Retailer 2£333 GBP
Retailer 5£395 GBP
Retailer 12£419 GBP
Retailer 6£532 GBP
Retailer 9£714 GBP
Reve Diamonds£810 GBP

44 data points across 15 retailers

20 retailers£123 GBP to £810 GBP

Retailer 1
-
£122 GBP
$163 USD
Price last confirmed 42 days ago
A
Retailer 2
-
£123 GBP
$164 USD
View
A
Retailer 3
-
£137 GBP
$183 USD
View
Final sale: no returns
A
Retailer 4
-
£143 GBP
$190 USD
View
Retailer 5
-
£149 GBP
$199 USD
View
Price last confirmed 40 days ago
A
Retailer 6
-
£152 GBP
$203 USD
View
A
Retailer 7
-
£222 GBP
$296 USD
View
A
Retailer 8
-
£269 GBP
View
B+
Retailer 9
-
£275 GBP
$366 USD
View
Retailer 10
-
£285 GBP
$380 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
£296 GBP
€376 EUR
View
Retailer 12
-
£304 GBP
$405 USD
View
Price last confirmed 25 days ago
B+
Retailer 13
-
£333 GBP
$444 USD
View
B+
Retailer 14
-
£395 GBP
$526 USD
View
B+
Retailer 15
-
£419 GBP
A$858 AUD
View
Retailer 16
-
£465 GBP
$619 USD
View
Price last confirmed 29 days ago
Retailer 17
-
£487 GBP
$648 USD
View
Price last confirmed 39 days ago
B
Retailer 18
-
£532 GBP
$708 USD
View
B
Retailer 19
-
£714 GBP
View
Most Expensive
B
Reve Diamonds
36B6E9567 · Oct 30
£810 GBP
$1,078 USD
View
19 more retailers have this diamond
Prices start from £123 GBPSave up to £687 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
0.99ct Round
£123 GBP