Post image

Between 18:01:22 UTC and 18:02:48 the Pancam of Opportunity
takes three images with narrow band filters in the three basic colors, from which it was possible to derive this extraordinary true color image of the Martian soil.
Personally, I was extraordinarily impressed by the greenish spots clearly visible on the larger rocks. They remind me very much of a similar phenomenon described by Dr. Gilbert Levin who during the mission of the Viking probes described the formation of greenish spots on the rocks near the two landers during the hottest periods of the Martian year.
Obviously from a single photo is not possible to establish anything certain, since it could well be even simple minerals such as serpentine or olivine.
However, I find it equally very interesting, who knows if Opportunity will have the opportunity to analyze them revealing their true nature.
Biological or mineral origin?

Unprocessed RGB HD image (raw):

Original BN images:

Red (735nm with 20nm bandwidth)
18:01:22 UTC
14:22:05 LTST

Green (535nm with 20nm bandwidth)
18:01:56 UTC
14:22:39 LTST

Blue (432nm with 32nm bandwidth)
18:02:48 UTC
14:23:29 LTST

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