On Tython I found a datacron containing a Blue Matrix Shard. I was told that I could combine them in some sort of combiner on Coruscant. Which leads to a couple important questions:
- How do they work? I.e., what can I make and how many do I need?
- What attributes do the different colors give?
- Can I get them anywhere else besides datacrons?
- Where are they all? I don’t want to miss one.
(I think this info is best in one question/answer, but let me know if it should be split.)
Three shards can be combined using an Assembler to form a Matrix Cube; the cubes are then used in your character’s Relics slots. There found on all the planets and only in datacrons.
As far as the number, there are 67 datacrons. However, there are a limited number of shards to be found (3 red, 3 yellow, 3 blue, 2 green–98% sure, again).
Here’s a video walkthrough with more details on how to use them:
This is the most comprehensive guide I could find on the locations of the datacrons (including those with shards):