| ほ | た | る | 
|---|---|---|
| 蛍 | 
| い | し | 
|---|---|
| 石 | 
noun, takes genitive case の
- fluorite, fluorspar.
Variations
| Pronunciation | Kanji | Kana | Is Common | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 
 
 | 蛍石 | ほたるいし | ||||||||
| 
 
 | 蛍石 | けいせき | ||||||||
| 
 
 | 螢石 | ほたるいし | ||||||||
| 
 
 | 螢石 | けいせき | 
Contained Kanji Breakdown
lightning-bug, firefly
ほたる ケイ (9th, N1)