Cobalt

Cobalt gets its name from 'kobold,' a mischievous goblin in German folklore. Medieval miners named it this because cobalt ores were toxic and ruined other metals they were trying to extract — they blamed goblins! Georg Brandt officially identified cobalt as a new element in 1735, making it the first metal discovered since ancient times.

Cobalt has been used for centuries to create a stunning deep blue color in glass, ceramics, and paint — the famous blue in Chinese porcelain and Delft pottery comes from cobalt. Today, cobalt is crucial for rechargeable lithium-ion batteries in phones, laptops, and electric vehicles. It is also used in super-strong alloys for jet engine turbines that withstand extreme heat.

Cobalt's symbol 'Co' is a versatile two-letter element in Spellement. It matches the start of many common words like 'cool,' 'come,' and 'color.' As one of the most frequent two-letter combinations in English, 'Co' is a natural building block for element-based spelling.