A graduated size and color hexbin that displays the total value of diamonds of a particular carat and depth from a dataset of 50k+ such diamonds. The style follows that of Scatterplot Matrix Techniques for Large N. Graduated hexbins that aggregate value do a better job of showing spatial distribution of values, as contrasted with graduated symbols that occlude each other as well as the region their purport to represent.
Here’s a version that shows the raw number of items in each hex using the same color and symbology.