Peridot belongs to the forsterite-fayalite mineral series which is part of the olivine group. It is one of the idiochromatic gems, meaning its color comes from the basic chemical composition of the mineral itself, not from minor impurities, and therefore will only be found in shades of green. In fact peridot is one of the few semi-precious gemstones found in only one color.
They have highly sensitive blood tests that can detect the pregnancy hormone (hCG) a few days earlier around day 3 to 4 after implantation. Again, some women have had positive urine tests as early as 2 to 3 days after implantation and others have had to wait up to a few weeks.
Best Answer: It can take up to 7 days to get implantation bleeding after fertilization. As for calculating how far pregnant you would be you can take the first day of your last mentrual period and count forward (I know it's weird but this is usually how they calculate how far along you are). If you are having implantation I would say you are probably around 3 weeks pregnant.