A detailed photochrom print of the Sapphire Pool in Yellowstone National Park, captured by William Henry Jackson.

This image captures the Sapphire Pool in Yellowstone National Park, rendered through the photochrom process. William Henry Jackson, a photographer who documented the American West, utilised this technique to add colour to black-and-white negatives. The process involves transferring the image onto lithographic stones, with each colour requiring a separate stone. The result is a detailed, tinted representation of the geothermal feature.

The composition focuses on the contrast between the deep blue water of the pool and the mineral-rich, orange-hued sinter deposits that line the edges. Steam rises from the water, obscuring the distant tree line and adding a sense of atmospheric depth to the scene. The foreground shows the textured, organic shapes of the sinter formations, which are characteristic of the hydrothermal basins found within the park.

Jackson was instrumental in the documentation of Yellowstone, and his photographs were used to support the establishment of the park as a protected area. This specific print reflects the late nineteenth-century interest in the American wilderness. The photochrom technique allowed for the mass production of these images, making them accessible to the public during an era when travel photography was gaining popularity. The print maintains a balance between scientific observation and aesthetic presentation, documenting the geological features of the region while providing a visual record of the park's unique environment.