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.
HGC is also the hormone that pregnancy tests detect. Implantation can occur anywhere from six to 12 days after ovulation, with it taking an average of about 10 days. However, it can take a couple of days after implantation for the body to produce sufficient levels of HGC for pregnancy tests to measure. Itâs generally recommended that women begin testing for pregnancy approximately 10 to 12 days after ovulation.