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Round|Lab Grown|IGI

1.89ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG758560174

Shape and cutting style on the report: Round brilliant

Certificate IGI LG758560174

Diamond specifications and retailer prices

From £186 GBP
$248 USD
As of October 26, 2026
Save £767 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £954 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.89ct lab-grown round diamond

This 1.89ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG758560174 or 758560174. Listed at 19 retailers as of October 26, 2026, with prices from £186 to £954, a £767 spread on the same certified stone. Brilliant Earth lists it at £954. 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

1.89
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758560174
Dimensions7.92 × 7.88 × 4.91 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.92 mm7.88 mm1.89 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG758560174
Side View
Table 57.0%Crown 34.9°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.1%

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 26
Current: £954 GBP|Low: £185 GBP|High: £978 GBP|Avg: £491 GBP
Brilliant Earth
Retailer 2
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Retailer 7
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Retailer 11
Retailer 12
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Retailer 19
October 29, 2026
Retailer 6£186 GBP
Retailer 19£208 GBP
Retailer 18£216 GBP
Retailer 3£231 GBP
Retailer 16£260 GBP
Retailer 11£360 GBP
Retailer 13£361 GBP
Retailer 2£365 GBP
Retailer 7£387 GBP
Retailer 10£430 GBP
Retailer 14£435 GBP
Retailer 5£468 GBP
Retailer 17£504 GBP
Retailer 4£582 GBP
Retailer 8£725 GBP
Retailer 12£738 GBP
Retailer 9£741 GBP
Retailer 15£926 GBP
Brilliant Earth£954 GBP

35 data points across 19 retailers

19 retailers£186 GBP to £954 GBP

A
Cheapest Retailer
-
£186 GBP
$248 USD
A
Retailer 2
-
£208 GBP
$277 USD
View
Final sale: no returns
A
Retailer 3
-
£216 GBP
$287 USD
View
A
Retailer 4
-
£231 GBP
$307 USD
View
A
Retailer 5
-
£260 GBP
HK$2,700 HKD
View
Retailer 6
-
£360 GBP
$480 USD
View
Price last confirmed 10 days ago
A
Retailer 7
-
£361 GBP
View
A
Retailer 8
-
£365 GBP
€463 EUR
View
B+
Retailer 9
-
£387 GBP
$515 USD
View
A
Retailer 10
-
£430 GBP
$572 USD
View
A
Retailer 11
-
£435 GBP
View
B+
Retailer 12
-
£468 GBP
A$958 AUD
View
B+
Retailer 13
-
£504 GBP
$671 USD
View
B+
Retailer 14
-
£582 GBP
$775 USD
View
B+
Retailer 15
-
£725 GBP
$965 USD
View
B+
Retailer 16
-
£738 GBP
SGD 1,328 SGD
View
B+
Retailer 17
-
£741 GBP
$987 USD
View
B
Retailer 18
-
£926 GBP
View
Most Expensive
B
Brilliant Earth
21805874A · Oct 29
£954 GBP
$1,270 USD
View
18 more retailers have this diamond
Prices start from £186 GBPSave up to £767 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
1.89ct Round
£186 GBP