This visualization displays the abundance of rare elements in the Earth's crust, ranking them by concentration in parts per million. The horizontal bar chart uses a linear scale for abundance and a band scale for element names, with data from CRC Handbook and Geochemistry sources. Built with React and D3.js v5, the SVG rendering includes tooltips showing element symbols, atomic numbers, and exact concentrations. The visualization highlights the comparative rarity of elements like rhenium and gold versus more common trace elements.