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1.77ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG485161718

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485161718

Diamond specifications and retailer prices

From $1,000 USD
As of October 31, 2026
Save $4,088 USD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,088 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.77ct lab-grown round diamond

This 1.77ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485161718 or 485161718. Listed at 12 retailers as of October 31, 2026, with prices from $1,000 to $5,088, a $4,088 spread on the same certified stone. MOH London lists it at $5,088. 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

1.77
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485161718
Dimensions7.81 × 7.87 × 4.75 mm
L/W Ratio1.01
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
7.81 mm7.87 mm1.77 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485161718
Side View
Table 58.5%Crown 32.6°Girdle: UNDPavilion 41.3°Culet: NoneDepth 60.5%

Caratlytics Score

How it works →
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 31
Current: $5,088 USD|Low: $1,000 USD|High: $5,156 USD|Avg: $2,338 USD
MOH London
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
November 1, 2026
Retailer 7$1,000 USD
Retailer 8$1,365 USD
Retailer 11$1,485 USD
Retailer 13$1,529 USD
Retailer 9$1,583 USD
Retailer 14$1,583 USD
Retailer 3$1,755 USD
Retailer 2$2,072 USD
Retailer 5$2,179 USD
Retailer 10$2,502 USD
Retailer 4$2,951 USD
Retailer 12$2,968 USD
Retailer 6$4,531 USD
MOH London$5,088 USD

24 data points across 14 retailers

12 retailers$1,000 USD to $5,088 USD

A
Cheapest Retailer
-
$1,000 USD
B+
Retailer 2
-
$1,365 USD
View
B+
Retailer 3
-
$1,485 USD
View
B+
Retailer 4
-
$1,529 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,583 USD
View
Retailer 6
-
$1,583 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
$1,755 USD
View
B+
Retailer 8
-
$2,072 USD
£1,632 GBP
View
B
Retailer 9
-
$2,502 USD
View
B
Retailer 10
-
$2,951 USD
View
B
Retailer 11
-
$2,968 USD
View
Most Expensive
B
MOH London
LG485161718 · Nov 1
$5,088 USD
£4,006 GBP
View
11 more retailers have this diamond
Prices start from $1,000 USDSave up to $4,088 USD

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
1.77ct Round
$1,000 USD