This stunning, large Sunstone Sphere measuring 9.2 cm in diameter displays gorgeous, glittering flecks of golden-orange. This Sunstone Sphere also displays small, subtle speckles of Black Tourmaline. Please note: this piece displays some very small natural pits on its otherwise smooth, polished surface. What Is Sunstone Made Of? Sunstone is a plagioclase feldspar mineral like Labradorite and Rainbow Moonstone. Sunstone displays a shimmering Schiller Effect termed "aventurescence": the stone is famed for its twinkling, sparkling flecks caused by the reflection of light between tiny mineral inclusions. This aventurescent effect is thus named because it is also present in Aventurine: for this reason, Sunstone has also been called "aventurescent feldspar". Due to this aventurescence, Sunstone displays glittering, golden metallic flashes as a result of either shimmering copper inclusions or hematite inclusions. Oregon Sunstone tends to include copper, whilst Sunstone from India, such as this piece, tends to include hematite.