Thank you! Yes, the stone is bicolour. The tip and two sides have purple edges. The stone overall is more pink than purple actually. The colour changes a bit depending on the light. In candle light it's an intense orange-y pink, in darkness with only my monitor it seems to glow a bit reddish (maybe UV from the monitor)?, in sun and daylight it's a blue-ish pink.
As I had to pick up an official document today for travel soon (which requires a negative COVID test) I figured I could just drop by a jeweller quickly... unfortunately they really can't tell just by looking at the colour and would have to send it off to their gemologist lab, which currently takes around a month due to summer time. I will go back and send it off when I'm back from travelling in August. But would be very happy for hints in the meantime.
The jeweler's first idea was amethyst, but then she said it is unusually pink for an amethyst. She was also surprised at the intensity of the glow under UV light. Then again she can't say whether it's from treatment, naturally etc...
My uneducated assumption right now is bicolour colour changing sapphire (from googling

feel like someone self-diagnosing reading up symptoms...).
Edit: I attached more pics from Sunlight, candlelight, indirect daylight and monitor light... I'm a bit obsessed with it right now
Direct sunlight
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Indirect daylight
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Candle
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Monitor
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