This is a Vintage Mexican Modernist Zig Zag Lightning Bolt Sterling Silver Brooch in 950 Silver (higher than the 925 Sterling Silver Standard) , by Alicia .
The Brooch measures 2 1/4" x 1 1/4" and weighs about 14 grams+ on my little Postal Scale. It is Marked TO-40 ALICIA 950. It is in Very Nice Vintage Condition, with light scratching.
Vintage Mexican 950 Sterling Modernist Zig Zag ALICIA Taxco Brooch