14. Inventories
 
  2018 
US$’000 
  2017 
US$’000 
 
Finished products 7 199    6 620   
Ore stockpile 1 338    5 807   
Consumables 14 623    8 399   
  23 160    20 826   
Impairment of consumables (117)   (24)  
Total carrying amount 23 043    20 802   

Inventories are stated at the lower of cost or net realisable value. The Group impaired certain consumables and spares as the operational use became doubtful with no anticipated recoverable amount or value in use. The impaired consumables are allocated equally to the PGM and chrome operating segments (2017: 35.0% and 65.0% respectively to the PGM and chrome operating segments). There were no write-downs to net realisable value during the year (2017: no write-downs).