but aragonite which forms within caves

This specimen of Mexican Magnetite is heavily decorated with superbly formed octahedral magnetite crystals

Color: Best Deep Purple

Product ID: TOGR3928

80 Grams TW

Pseudomorph Turquoise After Apatite | Perky Box Thumbnail Specimen | Sonora, Mexico Sillimanite but aragonite which forms withinA pseudomorph occurs when one mineral replaces another but retains the original mineral's crystal structure. In the case of turquoise after apatite pseudomorph, turquoise replaces apatite, but it still retains apatite's crystal shape. This process leads to a visually fascinating specimen where the exterior shape looks like apatite crystals, but the composition and color are distinctly turquoise, often with the bright blue or green shades typical of