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Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG778645865

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778645865

Diamond specifications and retailer prices

From $287 SGD
As of November 5, 2026
Save $1,795 SGD (86%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,082 SGD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778645865 or 778645865. Listed at 19 retailers as of November 5, 2026, with prices from $287 to $2,082, a $1,795 spread on the same certified stone. Brilliant Earth lists it at $2,082. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778645865
Dimensions7.39 × 7.43 × 4.55 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
7.39 mm7.43 mm1.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778645865
Side View
Table 58.0%Crown 35.4°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $2,082 SGD|Low: $276 SGD|High: $2,082 SGD|Avg: $754 SGD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 10$287 SGD
Retailer 7$321 SGD
Retailer 3$333 SGD
Retailer 12$355 SGD
Retailer 11$479 SGD
Retailer 8$591 SGD
Retailer 6$654 SGD
Retailer 13$681 SGD
Retailer 5$1,040 SGD
Retailer 4$1,143 SGD
Retailer 2$1,147 SGD
Retailer 9$1,432 SGD
Brilliant Earth$2,082 SGD

43 data points across 13 retailers

19 retailers$287 SGD to $2,082 SGD

A
Cheapest Retailer
-
$287 SGD
A
Retailer 2
-
$321 SGD
View
Final sale: no returns
A
Retailer 3
-
$333 SGD
View
A
Retailer 4
-
$355 SGD
View
Retailer 5
-
$355 SGD
View
Price last confirmed 21 days ago
A
Retailer 6
-
$392 SGD
View
B+
Retailer 7
-
$479 SGD
View
A
Retailer 8
-
$591 SGD
View
A
Retailer 9
-
$595 SGD
View
A
Retailer 10
-
$654 SGD
View
B+
Retailer 11
-
$681 SGD
View
Retailer 12
-
$1,040 SGD
View
Price last confirmed 58 days ago
B
Retailer 13
-
$1,143 SGD
View
B
Retailer 14
-
$1,147 SGD
View
B
Retailer 15
-
$1,151 SGD
View
B
Retailer 16
-
$1,210 SGD
View
Retailer 17
-
$1,432 SGD
View
Price last confirmed 8 days ago
B
Retailer 18
-
$1,625 SGD
View
Most Expensive
B
Brilliant Earth
18623571A · Nov 5
$2,082 SGD
$1,630 USD
View
18 more retailers have this diamond
Prices start from $287 SGDSave up to $1,795 SGD

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
1.55ct Round
$287 SGD