This is the 9213th most frequent Japanese word.
珍
Rare; unusual.
珍しい is an adjective describing something as rare or uncommon in this context.
この店には珍しい果物がたくさんあります。
This store has many rare fruits.
珍しい highlights the unusual nature of the items being collected here.
彼の趣味は珍しい収集品を集めることです。
His hobby is collecting rare items.
珍味 combines the idea of rarity and taste to imply unique or exotic food.