It is not literally made of diamonds, but it is worth several times its weight in them.
Funny thing... diamond's arn't actually worth much, that's just the result of De Beers having a monopoly so they can shrink their supply, and they are seen as valuable because of a ridiculous marketing push to make people use diamond engagement rings.
So, why bring this up? Lets just have a look at this card...
It might see some play in decks that might have otherwise played Dyson Mem Chip, which for one less credit, and being a 0 influence neutral card, provides you with the MU and the link, but not the bonus hand size.
Furthermore, this being in Shaper rather than neutral, like Dyson Mem Chip, basically just limits the decks it will be played in. (Dyson mostly having seen play in slower Criminal decks unless I'm mistaken) and I don't see the +1 hand size being worth enough to make anyone flock to it anyway.
The only place I can see myself using this, is in the Terminal Directive campaign, playing MU stacking Ayla, where it's another mem chip you can fit in your deck after all of your Akamatsu Mem Chips and Dhegdheers.
Just like diamonds in real life, the LLDS Memory diamond really isn't worth much.