Diamond Or cone * * * * * Partly correct. A rhombus can be called a diamond or a parallelogram or a quadrilateral. However, a rhombus is a 2-dimensional figure whereas a cone is 3-dimensional so you certainly could not call a rhombus a cone.
2
3-dimensional
The net of a 2 dimensional shape can be folded into a 3 dimensional shape
A hexagon is a 2-dimensional shape. A "structure" implies a 3-dimensional shape but you have not specified whether it is a hexagonal pyramid, a hexagonal prism or some other shape that is [partly] based on a hexagon. Without that information it is not possible to give a more helpful answer.
Diamond and Graphite are the two pure forms of carbon
That depends on where the forces will be coming from. If both structures are subjected to forces in 3 dimensions, then the 3 dimensional structure will be less apt to fall over or something. If by strength you mean not compressing, then the 2 dimensional structure might be better theoretically, though you couldn't really build a 2 dimensional structure.
Diamond Or cone * * * * * Partly correct. A rhombus can be called a diamond or a parallelogram or a quadrilateral. However, a rhombus is a 2-dimensional figure whereas a cone is 3-dimensional so you certainly could not call a rhombus a cone.
Graphite is a form of carbon where the carbon atoms are arranged in a layered structure, giving it lubricating properties and electrical conductivity.
A 2-dimensional figure. A 2-dimensional figure. A 2-dimensional figure. A 2-dimensional figure.
diamonds form a 3 dimensional latice. they also have have four bonds per atom. This makes a very strong material. graphite forms a 2 dimensional latice. it has 3 bonds per atoms (the fourth bond is added to the other three making partial double bonds). it forms sheets. it has excellent 2-d strength: it is what is used in carbon fibers. it also is an excellent lubricant because the sheets slide on one another. fullerenes are like graphite, but the small sheets are wrapped up into small balls or tubes. this gives them 3 d strength on a nano scale. But they lack large scale 3d properties
2
Both Diamond and Graphite are the formation of Carbon Atoms, Graphite is black and posseses dull appearance while diamond is Transparent and posseses shiny appearance, Diamond is a Hard Rock while Graphite is comparatively softer.
3-dimensional
3-dimensional
The net of a 2 dimensional shape can be folded into a 3 dimensional shape
According to Galleries page on diamonds:"Crystal System is isometric; 4/m bar 3 2/m; Crystal Habits include isometric forms such as cubes and octahedrons, twinning is also seen."