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.
Signs Of Normal Implantation Bleeding And How Long It Lasts. Implantation bleeding occurs early in pregnancy when a fertilized egg buries its way into your womb lining. It occurs about 10 to 14 days post the conception period or after the egg gets fertilized. This is also usually the same time your menstrual cycle is expected.