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1.80ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG459132297

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459132297

Diamond specifications and retailer prices

From $3,199 NZD
$1,800 USD
As of November 2, 2026
Save $1,857 NZD (37%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,433 NZD at Loose Grown Diamond · As of November 1, 2026
View at Loose Grown Diamond

About this 1.8ct lab-grown round diamond

This 1.8ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459132297 or 459132297. Listed at 12 retailers as of November 2, 2026, with a 58% 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

1.80
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459132297
Dimensions7.86 × 7.88 × 4.72 mm
L/W Ratio1.00
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
7.86 mm7.88 mm1.80 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459132297
Side View
Table 58.5%Crown 33.2°Girdle: MediumPavilion 40.3°Culet: NoneDepth 60.0%

Caratlytics Score

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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: Nov 2
Current: $7,433 NZD|Low: $3,199 NZD|High: $13,096 NZD|Avg: $6,272 NZD|+0.6%
Loose Grown Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$3,199 NZD
Retailer 5$4,106 NZD
Retailer 8$4,598 NZD
Retailer 7$4,763 NZD
Retailer 9$5,056 NZD
Retailer 2$6,532 NZD
Retailer 4$7,299 NZD
Loose Grown Diamond$7,433 NZD
Retailer 3$12,922 NZD

41 data points across 9 retailers

12 retailers$3,199 NZD to $5,056 NZD

B
Cheapest Retailer
-
$3,199 NZD
$1,800 USD
B
Retailer 2
-
$4,106 NZD
$2,310 USD
View
B
Retailer 3
-
$4,466 NZD
$2,513 USD
View
B
Retailer 4
-
$4,598 NZD
$2,587 USD
View
Final sale: no returns
B
Retailer 5
-
$4,763 NZD
$2,680 USD
View
Retailer 6
-
$4,763 NZD
$2,680 USD
View
Price last confirmed 22 days ago
B
Retailer 7
-
$5,056 NZD
$2,845 USD
View
Retailer 8
-
$6,532 NZD
£2,894 GBP
View
Price under review
Retailer 9
-
$6,548 NZD
$3,684 USD
View
Price under review
Retailer 10
-
$7,299 NZD
$4,107 USD
View
Price under review
Most Expensive
Loose Grown Diamond
459132297 · Nov 1
$7,433 NZD
$4,182 USD
View
Price under review
10 more retailers have this diamond
Prices start from $3,199 NZDSave up to $1,857 NZD

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
1.80ct Round
$3,199 NZD