this is a 3-pin bi-color LED that's been sanded down so you can clearly see the lead frame and LED chips.pic.twitter.com/p2Y15iph5m
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close-up of the two LED chips. one is shorter than the other.pic.twitter.com/9mnZXPEhol
tried a suggestion from @tradica and put a little oil on it to clear up the surface a bit. it helped a bit, but now there are tiny bubbles.
pic.twitter.com/zEhPr6OSer
wow, this bi-color LED is even more beautiful from a slightly different angle!pic.twitter.com/pY0NRJ4Qih
Thanks for the informative postings 

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