Hematite is the mineral form of iron oxide. In its crystallized form, hematite of all colors forms a rhombohedral lattice. A single crystal is in the form of rhombohedron.
hexagonal
yes
Hematite is rust or Fe2O3 a.k.a. Iron(III)oxide but if you want to make crystal hematite that's used for jewellery than you have to heat up rust ABOVE 950 degrees celsius
It has no crystal shape.
Grayish to black
Hematite is black.
Hematite is often used for protection. But crystals and rocks will not harm a ghost.
Hematite is the main component of Fe2O3, single crystal often has rhombohedral and plate, aggregates varied shapes. Metallic luster to the semi-metallic luster, hardness of 5.5 to 6.0, a density of 5.5 ~ 5.3 g · cm-3. Iron was black, shiny sheet metal aggregates called mirror hematite iron ore; gray, metallic flake mica, hematite aggregates called hematite; reddish brown, shiny dark ocher called ; was kidney-shaped hematite called kidney-shaped hematite. Hematite widely distributed in nature pole is an important raw material for iron, a red pigment may also be used.
Hematite is red to redish brown in ores forms and steel grey to black in its crystalline form. Hematite's luster varies from sub-metallic to extremely shiny.
Hematite, also spelled as hæmatite, is the mineral form of Iron(III) oxide (Fe2O3), one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and as corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950°C. Hematite is a mineral, colored black to steel or silver-gray, brown to reddish brown, or red. It is mined as the main ore of iron. Varieties include kidney ore, martite (pseudomorphs after magnetite), iron rose and specularite (specular hematite). While the forms of hematite vary, they all have a rust-red streak. Hematite is harder than pure iron, but much more brittle. Maghemite is a hematite- and magnetite-related oxide mineral.
Pearls are not crystalline and don't have a crystal shape.
Hematite appears red in color due to its chemical composition, specifically the presence of iron oxide. The iron oxide in hematite reflects light in a way that produces the red color we perceive. Additionally, the crystal structure of hematite also plays a role in how it interacts with light, contributing to its red appearance.