Usually, such colors are rather weak in appearance; however, vivid colors are occasionally reported, especially with fireballs. Reported colors range across the spectrum, from reds, yellows, greens, and blues, to gold, orange, and (infrequently violet. The velocity of the meteor also plays an important role, since a higher level of kinetic energy will excite the atoms/molecules to a higher degree.

Originally posted by MikeboydUS
At around this time I observed an object with that description. It appeared to make landfall, but I observed no impact or flash of light. The object left no trail and appeared to be some type of meteor.

This is one of the best meteor showers of the year and never seems to disappoint observers.

This meteor shower gets the name "Geminids" because it appears to radiate from the constellation Gemini. An observer in the Northern Hemisphere can start seeing Geminid meteors as early as December 6, when one meteor every hour or so could be visible. During the next week, rates increase until a peak of 50-80 meteors per hour is attained on the night of December 13/14. The last Geminids are seen on December 18, when an observer might see a rate of one every hour or so.

Originally posted by MikeboydUS
It appears that green fireballs/meteors have been seen since the 1940s.

Originally posted by veryrandomannonomous
I heard of another incident like this but I haven't the faintest inkling of what it may be.

Originally posted by C.H.U.D.
It's a meteor. Meteors occur all the time. Some are green.

Vivid colors are more often reported by fireball observers because the brightness is great enough to fall well within the range of human color vision. These must be treated with some caution, however, because of well-known effects associated with the persistence of vision. Reported colors range across the spectrum, from red to bright blue, and (rarely) violet. The dominant composition of a meteoroid can play an important part in the observed colors of a fireball, with certain elements displaying signature colors when vaporized. For example, sodium produces a bright yellow color, nickel shows as green, and magnesium as blue-white. The velocity of the meteor also plays an important role, since a higher level of kinetic energy will intensify certain colors compared to others. Among fainter objects, it seems to be reported that slow meteors are red or orange, while fast meteors frequently have a blue color, but for fireballs the situation seems more complex than that, but perhaps only because of the curiousities of color vision as mentioned above.

Can a meteorite dropping fireball be observed all the way to impact with the ground?

No. At some point, usually between 15 to 20 km (9-12 miles or 48,000-63,000 feet) altitude, the meteoroid remnants will decelerate to the point that the ablation process stops, and visible light is no longer generated. This occurs at a speed of about 2-4 km/sec (4500-9000 mph).

From that point onward, the stones will rapidly decelerate further until they are falling at their terminal velocity, which will generally be somewhere between 0.1 and 0.2 km/sec (200 mph to 400 mph). Moving at these rapid speeds, the meteorite(s) will be essentially invisible during this final "dark flight" portion of their fall.