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Color change garnet is

a rare, untreated, and highly coveted gemstone—often a pyrope-spessartite hybrid—that shifts color under different light sources. It typically appears blue, teal, or green in daylight (or fluorescent light) and changes to reddish, purple, or pink in incandescent, candlelight, or LED light.

Key Characteristics:

• Phenomenon: Unlike color-shift stones, true color-change garnets display a dramatic, distinct color flip, often comparing to high-quality alexandrite.

• Colors: Common transitions include blue-green to violet-purple, brownish-green to rose-purple, and grey-green to pinkish-red.

• Composition & Rarity: They are typically rare, with significant deposits in Madagascar, Tanzania, and Kenya. Their unique color is caused by high concentrations of vanadium or chromium.

• Durability: They have a Mohs hardness of 7 to 7.5, making them durable for daily wear.

• Origin: The most famous, often called "blue garnets," originated in Bekily, Madagascar.

• Appearance: They are usually faceted into various shapes, including ovals, rounds, and cushions.

These gems are prized by collectors for their dramatic color-changing ability, which is best appreciated when viewed under varying light conditions.