Ametrine 3x7-6x12mm Chip - 15-16 Inch feature_12142023 striated crystals

striated crystals

It forms when Quartz and Feldspar crystallize in radial aggregates within other silica to rich stones

Nangka is the name commonly used in the Philippines for the Jackfruit Tree

Argentinian Blue Onyx and Argentinian Aquamarine Onyx

due to variations in iron content

Ametrine 3x7-6x12mm Chip - 15-16 Inch feature_12142023 striated crystalsAmetrine is quartz that occurs in bands of purple and yellow. As the name suggests, it is a combination of Amethyst and Citrine. The different colored zones in the stone result from different oxidation states of iron, due to exposure to different temperatures during its formation. It is believed that Ametrine was first introduced to Europe by a conquistadors gift from Bolivia to the Spanish Queen.