Racial motifs represent a skill in the Elder Scrolls Online used in Crafting, specifically Blacksmithing, to craft in a style corresponding to a race. By default, your character will know only the Motif associated with their race.


Listing of Racial Motifs
The following is the current list of Racial Motifs, followed by the material used with that motif:
High Elf (Altmer) - Adamantite
Wood Elf (Bosmer) - Bone
Khajiit - Moonstone
Argonian - Flint
Nord - Corundum
Dark Elf (Dunmer) - Obsidian
Breton - Molybdenum
Orc - Manganese
Redguard - Starmetal
Ancient Elf - Malachite
Barbaric - Copper
Daedric - Daedra Heart
Imperial - Nickel
Primal - Argentum

Understanding and Acquiring Racial Motifs
You can not buy Racial Motifs from Vendors in-game; although you can buy or trade with other players. Racial Motifs are tied to your character; not your account. Finding Racial Motifs in game is uncommon although there are tips you can follow that will make your chances better: look inside buildings/structures, in containers inside those structures; such as desks, chests/trunks, night stands, dressers (basically furniture). Also check for Racial Motifs in areas that are out of the way (where other players are fewer).

Understanding and Acquiring Styling Materials
The styling materials used for crafting in the style of a Racial Motif can be found or purchased from in-game Vendors (and players), specifically Clothiers (and possibly others). The styling materials used for styling a Racial Motif are not to be confused with the materials used to create an item. When Blacksmithing, there will be an option reflecting a Material, such as Iron or Steel, and Styles, such as Molybdenum for the Breton Racial style, or Obsidian for the Dunmer (Dark Elf) Racial style. In other words, there are Blacksmithing Materials (Iron, Steel, etc.), and Blacksmithing Style [Materials] (Molybdenum, Obsidian). Like Racial Motifs, styling materials can be found in buildings/structures, inside containers inside those structures; such as desks, chests/trunks, night stands, dressers (basically furniture); unlike Racial Motifs, you can find styling materials in the wild in backpacks, in dungeons in containers such as urns, pots et al.. Blacksmithing materials such as Iron can be mined in the wild when you find a deposit; you will never find a deposit of a style material so these are not things you can mine.

I found the following video to be extremely helpful:

https://www.youtube.com/watch?v=UEfymeqIWhY

Further Questions

1. Can I read/use a Racial Motif book that I have already read/used? No.
2. How do I know which Racial styles I have available (from Racial Motifs)? Once a Racial Motif book is read/used, it will become available under Style when creating an item at a Blacksmithing station; if the style is red, then you have no styling materials (however this is easy to correct, read above).
3. Are Racial styling (from Racial Motifs) tied to my Account or my Character? Character; although you will likely come across Racial Motifs that you already have learned, and you can put these in a Bank to be available to other characters.