The birthstone gem associated with the month of March is Aquamarine. The colour of this gem varies from a sea-green, (from which its name is derived) to the more familiar sky blue or dark blue. The gem can appear blue or colourless depending on the angle it’s viewed from. The gem cutters skill is to cut the gem facets so that it brings out the best of its colour, sparking as it’s worn. Aquamarine┬áis related to the Emerald family.