Your dragon made you resistance to Acid and Poison.

Your dragon gave you blindsight with a radius of 10 feet and darkvision with a radius of 60 feet.

When you take the Attack action on your turn, you can replace one of your attacks with an exhalation of magical energy in a 15-foot cone. Each creature in that area must make a Dexterity saving throw (DC = 8 + your Constitution modifier + your proficiency bonus). On a failed save, the creature takes 1d10 damage of the type associated with your Gem Ancestry. On a successful save, it takes half as much damage. This damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10). You can use your Breath Weapon a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

When determining your character’s ability scores, increase one of those scores by 2 and a different score by 1, or increase three different scores by 1. Follow this rule regardless of the method you use to determine the scores, such as rolling or point buy.

Lizardfolk are a little bulkier and taller than humans, and their colorful frills make them appear even larger. Your size is Medium.

Your base walking speed is 30 feet, and you have a swimming speed of 30 feet.

Your fanged maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

As part of a short rest, you can harvest bone and hide from a slain beast, construct, dragon, monstrosity, or plant creature of size Small or larger to create one of the following items: a shield, a club, a javelin, or 1d4 darts or blowgun needles. To use this trait, you need a blade, such as a dagger, or appropriate artisan’s tools, such as leatherworker’s tools.

You can hold your breath for up to 15 minutes at a time.

You gain proficiency with two of the following skills of your choice: Animal Handling, Nature, Perception, Stealth, and Survival.

You have tough, scaly skin. When you aren’t wearing armor, your AC is 13 + your Dexterity modifier. You can use your natural armor to determine your AC if the armor you wear would leave you with a lower AC. A shield’s benefits apply as normal while you use your natural armor.

In battle, you can throw yourself into a vicious feeding frenzy. As a bonus action, you can make a special attack with your bite. If the attack hits, it deals its normal damage, and you gain temporary hit points (minimum of 1) equal to your Constitution modifier, and you can’t use this trait again until you finish a short or long rest.

You can speak, read, and write Common and Draconic.