I believe it is Rhombus
Square
A rhombus is just another name for a diamond. So therefore, a diamond shape.
There is no name but a cylinder is the nearest standard geometric shape.
Argyle
A diamond.
rhombus
Square
A rhombus is just another name for a diamond. So therefore, a diamond shape.
The name of an eleven sided geometric shape is a Hendecagon or endecagon.
Its the name for a shape
rhomboid; rhombus
The real name for the shape of a diamond is "rhomboid," specifically when referring to a two-dimensional geometric shape. However, in the context of gemstones, a diamond is typically cut into various shapes, with the most common being the "brilliant cut," which features a round shape with numerous facets to enhance its sparkle. The term "diamond" itself refers to the crystal structure of the mineral, which is a form of carbon.
sphere
A heptagon.
There is no name but a cylinder is the nearest standard geometric shape.
a quadrilateral sideways, a pentagon looks like a crown.
metallic