How much does a 0.75 to 0.99ct I VS1 lab grown marquise diamond cost?

As of November 2026, 0.75 to 0.99ct I VS1 lab grown marquise diamonds typically cost $336 NZD to $1,846 NZD, with a median price of $908 NZD. There are currently 6 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 marquise diamond?

About 15% of these diamonds are available at multiple retailers, with an average price spread of 114%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct I VS1 Lab Grown Marquise

Quick answer

As of November 2026, there are 6 lab grown marquise diamonds with I colour and VS1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $336 NZD to $1,846 NZD, with a median of $908 NZD. At least 22 retailers stock this exact specification, and 15% of the stones appear at more than one of them, with an average price spread of 114%. Half of all listings fall between $914 NZD and $2,488 NZD per carat. The same specification in natural form lists at a median of about $5,544 NZD per carat. Over the last 30 days the median price moved -3.5% and the number of listings moved +0.4%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise lab grown stones in the index: 485 USD per carat, -3.2% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: November 2026

Available

Lowest Price

$293 NZD

Highest Price

$3,693 NZD

Average Price

$1,105 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

15.0%

Price Spread

114.1%

30-Day Price Trend

-3.5%

30-Day Supply Change

+0.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$778/ct

10th Percentile

$385

Median

$778

90th Percentile

$3,241

Score Distribution

8 diamonds scored across 4 quality tiers

Excellent

1 (12.5%)

Very Good

5 (62.5%)

Good

1 (12.5%)

Average

1 (12.5%)

Find Your Diamond

Search 6 I VS1 marquise diamonds and compare prices.

Search Diamonds

Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1