CaratHunter
Plans
Round|Lab Grown|IGI

1.70ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG492136571

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492136571

Diamond specifications and retailer prices

From $1,550 USD
As of October 31, 2026
Save $1,161 USD (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,738 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.7ct lab-grown round diamond

This 1.7ct 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 LG492136571 or 492136571. Listed at 13 retailers as of October 30, 2026, with a 75% 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

1.70
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492136571
Dimensions7.66 × 7.70 × 4.67 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
7.66 mm7.70 mm1.70 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492136571
Side View
Table 58.0%Crown 33.1°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.8%

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: $7,738 USD|Low: $1,550 USD|High: $7,841 USD|Avg: $3,690 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
November 1, 2026
Retailer 8$1,550 USD
Retailer 7$2,491 USD
Retailer 11$2,711 USD
Retailer 3$2,790 USD
Retailer 4$2,890 USD
Retailer 9$2,890 USD
Retailer 5$3,854 USD
Retailer 12$3,972 USD
Retailer 6$4,333 USD
Retailer 10$4,504 USD
Retailer 2$4,814 USD
MOH London$7,738 USD

44 data points across 12 retailers

13 retailers$1,550 USD to $2,711 USD

B
Cheapest Retailer
-
$1,550 USD
B
Retailer 2
-
$2,491 USD
View
B
Retailer 3
-
$2,711 USD
View
Retailer 4
-
$2,790 USD
View
Price under review
Final sale: no returns
Retailer 5
-
$2,890 USD
View
Price under review
Retailer 6
-
$2,890 USD
View
Price under review
Retailer 7
-
$3,055 USD
View
Price under review
Retailer 8
-
$3,854 USD
£3,035 GBP
View
Price under review
Most Expensive
MOH London
LG492136571 · Nov 1
$7,738 USD
£6,093 GBP
View
Price under review
8 more retailers have this diamond
Prices start from $1,550 USDSave up to $1,161 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.

B
1.70ct Round
$1,550 USD