From Melvor Idle

A template for quickly building item links with icons. For example, {{ItemIcon|Compost}} becomes Compost (item).svg Compost.

Adding a second argument allows you to override the text. For example, {{ItemIcon|Generous Harvest Potion I|Generous Harvest Potion}} gives Generous Harvest Potion I (item).svg Generous Harvest Potion

Optionally, you can set the 'ext' argument for the rare items that have non-SVG extensions. For example, {{ItemIcon|Crown of Rhaelyx|ext=png}} gives Crown of Rhaelyx (item).png Crown of Rhaelyx

Also the qty option allows you to set a number of an item, so {{ItemIcon|Red Dragonhide|qty=200}} becomes 200 Red Dragonhide (item).svg Red Dragonhide

Size option allows for larger icons. {{ItemIcon|Bird Nest|size=50}} becomes Bird Nest (item).svg Bird Nest