Anyone else a fan of Steven Universe? It occurred to me yesterday that the gems would make a great PC race, so I thought I'd put something together for 5e based on what we currently know/suspect of SU lore. Here goes!

Ability Score Increase. Your Constitution score increases by 2.
Age. Gems do not age. They emerge from the ground fully-formed, and often live for thousands of years.
Alignment. Gems exhibit a variety of alignments. Those who have spent time on Earth tend to value freedom more than others of their kind.
Speed. Your base movement speed is 30 feet.
Alien Biology. You have a limited ability to shapeshift. As an action, you can change your appearance as per the Change Appearance option of the Alter Self spell. Once you have used this ability, you cannot do so again until you complete a long rest. In addition, you do not require food and drink for sustenance.
Gem Weapons. All gems possess a personal extradimensional space from which they can summon weaponry at a moment's notice. Choose one type of two-handed weapon, two types of one-handed weapon or one type of one-handed weapon and a shield. As a free object interaction, you can retrieve a copy of these weapons from the extradimensional space.
If you move more than 60 feet away from a gem weapon, it ceases to exist. Alternately, you can dispel any number of your own gem weapons as a bonus action.
Poof! If you are reduced to 0 hit points, you do not fall unconscious. Instead, your body disappears and your consciousness retreats inside your gem, from where you are unable to perceive the outside world or affect it in any way. While inside your gem, you have advantage on death saves and cannot be targetted by any ability, including hostile attacks and friendly healing. Additionally, if you are stable, you may reconstitute your body on your next turn, with 1 hit point. For every hour you remain in your gem, you recover a number of hit points equal to a quarter of your maximum hit points (rounded down).
Subrace. There are many distinct types of gem. Choose one of the following subtypes:

Ability Score Increase. Your Strength score increases by 1.
Size. Your size is medium.
Savage Attacks. When you score a critical hit with a melee weapon attack, you can roll one of the weapon's damage dice one additional time and add it to the extra damage of the critical hit.

Ability Score Increase. Your Charisma score increases by 1.
Size. Your size is small.
Elemental Affinity. You are unaffected by extremes of temperature, and can hold your breath indefinitely.

Ability Score Increase. Your Dexterity score increases by 1.
Size. Your size is medium.
Tailor-Made Servants. You gain proficiency with any two tools, languages or musical instruments of your choice.

Ability Score Increase. Your Intelligence score increases by 1.
Size. Your size is small.
Technician. As an action, you can identify the purpose or function of any machine, mundane or magical. In addition, you may apply your proficiency bonus to any ability check made to operate, pilot or control such a machine.

So, any thoughts? Is the wording of the abilities clear enough? Would you want to play with this race?

Future plans: advanced shapeshifting racial feat, stat block for flask robonoid familiar, diamond subrace (once there is enough detail in the canon to define them) half-gem hybrid race, rules for fusion?!