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Round|Lab Grown|IGI

1.55ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG487108204

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487108204

Diamond specifications and retailer prices

From $2,050 AUD
$1,440 USD
As of October 31, 2026
Save $1,253 AUD (38%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,799 AUD at Loose Grown Diamond · As of October 26, 2026
View at Loose Grown Diamond

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG487108204 or 487108204. Listed at 13 retailers as of October 31, 2026, with a 61% 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

1.55
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487108204
Dimensions7.38 × 7.40 × 4.61 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.38 mm7.40 mm1.55 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487108204
Side View
Table 56.5%Crown 35.9°GirdlePavilion 40.8°Culet: NoneDepth 62.5%

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: Oct 31
Current: $4,799 AUD|Low: $2,050 AUD|High: $8,857 AUD|Avg: $4,639 AUD|+0.7%
Loose Grown Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 6$2,050 AUD
Retailer 5$2,638 AUD
Retailer 8$2,954 AUD
Retailer 7$3,061 AUD
Retailer 9$3,303 AUD
Retailer 2$4,191 AUD
Loose Grown Diamond$4,799 AUD
Retailer 4$5,148 AUD
Retailer 10$8,322 AUD
Retailer 3$8,789 AUD

41 data points across 10 retailers

13 retailers$2,050 AUD to $3,303 AUD

B
Cheapest Retailer
-
$2,050 AUD
$1,440 USD
B
Retailer 2
-
$2,638 AUD
$1,853 USD
View
B
Retailer 3
-
$2,870 AUD
$2,016 USD
View
B
Retailer 4
-
$2,954 AUD
$2,075 USD
View
Final sale: no returns
Retailer 5
-
$3,061 AUD
$2,150 USD
View
Price last confirmed 19 days ago
B
Retailer 6
-
$3,061 AUD
$2,150 USD
View
B
Retailer 7
-
$3,303 AUD
$2,320 USD
View
Retailer 8
-
$4,191 AUD
£2,318 GBP
View
Price under review
Most Expensive
Loose Grown Diamond
487108204 · Oct 26
$4,799 AUD
$3,371 USD
View
Price under review
8 more retailers have this diamond
Prices start from $2,050 AUDSave up to $1,253 AUD

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
1.55ct Round
$2,050 AUD