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Section: August

August — Peridot

Peridot — gem olivine, one colour only

Mohs 6.5 to 7 and sensitive to acids and rapid temperature change. Occasional wear; keep it away from steam.

3 pieces in this month, ordered by how often they can sensibly be worn — the most forgiving first.

Mineralogy

Peridot is gem-quality forsterite olivine, magnesium iron silicate. Its green comes from iron in the structure itself rather than from a trace impurity, which is why peridot is only ever green. Mohs 6.5 to 7. Some peridot on the market arrived on meteorites.

What the trade does to it

Peridot is one of the very few coloured stones that is essentially never treated — there is no useful treatment for it. Every peridot here is declared untreated.

Documented history

Peridot has held August since 1912. The Egyptian island of Zabargad in the Red Sea was mined for peridot from at least 300 BC, and material from it sits in several European cathedral treasuries.

August pieces

From £79 · all prices include VAT

Nothing in August reaches Mohs 8, so no piece in this month is graded for daily wear. If the piece needs to be worn every day without special care, look at April, July or September instead. We would rather say that than sell you something that will not survive the way you intend to wear it.

Wear grades in this month

  • Suitable for daily wear

    0 pieces in August

    • Remove before contact sports and heavy manual work
    • Remove before swimming pools and hot tubs — chlorine attacks the metal, not the stone
  • Occasional wear — avoid knocks

    3 pieces in August

    • Remove before gym equipment, gardening, DIY and washing up
    • Do not stack against harder stones, which will abrade this one
    • Avoid sudden temperature change
  • Delicate — special occasions only

    0 pieces in August

    • Remove before any physical activity — knocks will chip this stone
    • Keep away from perfume, hairspray, cosmetics and hand sanitiser
    • Avoid sudden temperature change and prolonged dry heat
    • No ultrasonic tank, no steam, no soaking

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