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.
Thus, 4-5 days after implantation (i.e. approximately before the due time of the expected period), the HCG content in the blood sample is about 25mIU/ml. It can be detected by an immunoassay (analysis of a blood serum, taken from a vein in special laboratories).e careful when choosing a test in a drugstore! If the package has a note, saying âsensitivity 20 mIU/mlâ, then the test is suitable for early detection of pregnancy (immediately after the delay). Tests, with a note âsensitivity 40 mIU/mlâ can be used no sooner than on the 7-9 day after implantation bleeding.