Agate (specifically, multi-colored or pastel-dyed agate)

Hardness: 5-6 on the Mohs scale (for Chalcedony, which forms much of Fluorite-like material); true Fluorite is 4. Color: The beads show a range of colors including light blue, light green, purple, and yellow. This multi-coloration is common in various forms of quartz (like Chalcedony) and also in Rainbow Fluorite. Luster: Vitreous to waxy/dull, especially for the polished beads. Crystal structure: The beads are polished, so individual crystal structure is not visible, but material like chalcedony is microcrystalline, while fluorite is typically isometric (cubic, octahedra). Cleavage: Not applicable for polished beads, but fluorite has perfect octahedral cleavage, and chalcedony has none.

Agate (Chalcedony) forms in volcanic and metamorphic rocks, often within nodules or veins, where silica-rich fluids deposit layers over time. The pastel colors seen in these beads are very likely the result of artificial dyeing processes, which are commonly applied to agate to enhance or introduce new colors. Geological Age: Agates can form over millions of years, from recent geological times to hundreds of millions of years ago, depending on the host rock formation.

Predominantly used in jewelry (beads, cabochons, carvings) and ornamental objects due to its attractive banding, colors (natural or dyed), and ability to take a high polish. Also collected by mineral enthusiasts.

Given the smooth, polished appearance of the beads and the range of pastel colors, these beads are most likely made from dyed agate (a form of chalcedony/microcrystalline quartz) or possibly a type of fluorite, also known as 'Rainbow Fluorite' due to its color banding. However, the slightly translucent and somewhat pastel nature with subtle variations leans more towards treated agate or a similar quartz-based material. Agate is often dyed to achieve such vibrant and varied colors. Fluorite tends to be softer. Agate is known for its durability and takes a good polish, making it ideal for beads and cabochons. Fluorite, while beautiful, is softer and more prone to scratching, making agate a more common choice for everyday jewelry like bracelets.

Identification in the field: Natural agate usually shows distinct banding or patterns. The beads here are uniformly colored per bead but show a range of colors across the bracelet, suggesting either a naturally multi-colored variety (less common in these pastel tones) or (more likely) dyed agate. Common Locations: Agate is found worldwide, with significant deposits in Brazil, Uruguay, Mexico, the United States (Oregon, Montana), and India. Dyed agate is processed globally. Tips for Collectors: For identification of dyed vs. natural, look for unnaturally bright or uniform colors that don't typically occur in nature for that mineral. Dyed agate colors often penetrate deep into the stone, but sometimes a closer look at areas like drill holes or chips can reveal the original color.