How much does a 1.00 to 1.49ct J SI1 natural asscher diamond cost?

As of October 2026, 1.00 to 1.49ct J SI1 natural asscher diamonds typically cost HK$10,419 HKD to HK$28,754 HKD, with a median price of HK$16,907 HKD. There are currently 56 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 asscher diamond?

About 35% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J SI1 Natural Asscher

Quick answer

As of October 2026, there are 56 natural asscher diamonds with J colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$10,419 HKD to HK$28,754 HKD, with a median of HK$16,907 HKD. At least 51 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between HK$11,126 HKD and HK$18,633 HKD per carat. Over the last 30 days the median price moved -2.6% and the number of listings moved +9.4%.

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. Asscher natural stones in the index: 2,504 USD per carat, -3.3% 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: October 2026

Available

Lowest Price

HK$6,175 HKD

Highest Price

HK$42,071 HKD

Average Price

HK$18,946 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

35.1%

Price Spread

53.6%

30-Day Price Trend

-2.6%

30-Day Supply Change

+9.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,786/ct

10th Percentile

$1,143

Median

$1,786

90th Percentile

$3,004

Score Distribution

215 diamonds scored across 4 quality tiers

Excellent

14 (6.5%)

Very Good

29 (13.5%)

Good

31 (14.4%)

Average

141 (65.6%)

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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