3.00 to 4.99ct E SI1 Natural Marquise
Last updated: July 2026
Available
18
Lowest Price
$30,941 USD
Highest Price
$119,510 USD
Average Price
$53,429 USD
Market Intelligence
Retailers Selling
42
Cross Retailer %
N/A
Price Spread
24.1%
30-Day Price Trend
N/A
30-Day Supply Change
N/A
Volatility (30d)
N/A
Price Range
Price per carat distribution across retailers
10th Percentile
$14,260
Median
$18,414
90th Percentile
$23,504
Score Distribution
18 diamonds scored across 4 quality tiers
Excellent
4 (22.2%)
Very Good
6 (33.3%)
Good
5 (27.8%)
Average
3 (16.7%)
Find Your Diamond
Search 18 E SI1 marquise diamonds and compare prices.
Search DiamondsConsider Instead
Save money without compromising on what matters. These alternatives are visually similar but cost less.