1.00 - 1.49ct I SI1 Natural Radiant
As of April 2026, there are 1,636 natural radiant diamonds with I color and SI1 clarity in the 1.00 - 1.49ct range available across retailers worldwide. Prices range from ￥44,627 JPY to ￥110,637,755 JPY, with an average of ￥1,727,568 JPY.
Last updated: April 2026
Available
1,636
Lowest Price
￥44,627 JPY
Highest Price
￥110,637,755 JPY
Average Price
￥1,727,568 JPY
Market Intelligence
Retailers Selling
55
Cross Retailer %
N/A
Price Spread
41.6%
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
$1,627
Median
$2,347
90th Percentile
$3,802
Score Distribution
1.6K diamonds scored across 4 quality tiers
Excellent
242 (14.8%)
Very Good
575 (35.1%)
Good
577 (35.3%)
Average
242 (14.8%)
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