Jewel Geyser has a unique structure as a linear pool with a built up yellow-red cone of geyserite deposits along the edge. Possibly named from the droplet of water during an eruption or from the glistening geyserite sinter surrounding the vent. Most of the geyserite is pea-sized on small mounds, but larger mounds also exist. Some of the shallow pools between the geyserite contain orange thermophiles and the surrounding area is covered with solidified sinter. Jewel Geyser frequently erupts, with intervals in the 4–12 minute range.

Jewel Geyser has an average temperate of 165.8°F (74.3°C), an average pH of 8.4, and an average conductivity of 2143 uS/cm.

Geysers

Geysers have constrictions in their plumbing systems that prevent water from moving freely to the surface where heat would escape. Water beneath the constrictions creates a buildup of steam. Eventually the steam pushes water past the constrictions and the geyser erupts.

Use Caution in Hydrothermal Areas

• Stay on boardwalks and designated trails.
• Hydrothermal water can severely burn you.
• Never run, push, or shove.
• Supervise children at all times.
• Do not scratch hydrothermal mats.

You are responsible for your safety.

Think safety, act safely. Yellowstone is a dangerous place.