Diamond is composed of carbon.
composition
composition
Moissanite presents an interesting alternative to diamonds, insofar as gem-quality 'bling' is concerned. Some describe it as a substantive alternative to diamond many times more valuable than other diamond alternatives. Because of natural moissanite's innate physical and chemical properties, it is difficult for the untrained eye to identify as different from diamonds. A certified gemologist will always be able to identify moissanite, because its base composition from silicon carbide is fundamentally different from a diamond's composition of carbon. You can read more about moissanite and diamond, below.
'Regular diamonds' are diamonds described without colour. 'Chocolate diamonds' are brown diamonds that include a description of the colour.
According to My Research Diamonds are composed of carbon atoms arranged in a crystal lattice structure. The chemical composition of diamonds consists solely of carbon (C). Each carbon atom in a diamond is bonded to four other carbon atoms in a tetrahedral structure, forming a three-dimensional network of strong covalent bonds. This arrangement gives diamonds their exceptional hardness and unique optical properties. Therefore, unlike many other gemstones, diamonds do not contain additional compounds or elements beyond carbon.
Diamonds are composed of carbon.
Diamonds are formed from carbon.
Diamonds are composed of carbon, with traces of other minerals, which can give the diamond a colour.
Depending on the composition of 'phony diamonds', yes, genuine diamonds will probably weigh more. The specific gravity of diamonds is 3.5, which is above average.
In the 1700s, Lavoisier proved that diamonds are carbon only, by burning one and analysing the gas to show that it was CO2. Therefore the diamond was carbon. Yellow diamonds have a contamination of nitrogen, and blue ones of boron.
composition
composition
Gem-quality diamonds are coloured by the inclusion of trace minerals within the crystalline composition of the diamond. For example, nitrogen makes diamonds yellow and/or brown; boron gives diamonds a blue hue, and some coloured diamonds acquire their colour based on structural defects.
All diamonds are formed deep within the earth's mantle and are erupted to the surface by way of volcanic pipes. Diamonds are found on every continent except Europe and Antarctica. That there are diamonds in Africa is simply part of the earth's composition and geological evolution.
Graphite and Diamonds are both allotropes of Carbon.
'Best' is a judgment and you are the judge. Take your diamonds and their settings to a certified gemologist, who will help you document the diamonds as to their clarity, colour, cut and carat weight, and who will also help you determine composition of the setting metal. If the setting is signed by a named designer, the design alone may have value.
From ExtremeScience.com: "Scientists estimate that about 50% of the moon's surface composition is oxygen, bound up in silicate minerals!" Even with extensive study, there have been no reports of diamonds or crystals in moon soil. Read more, below.