Or HaChaim on Exodus 25:38/אור החיים על שמות כ״ה:ל״ח

1 ומלקחיה, ומחתותיה זהב טהור; both its tongs and its snuffdishes to be of pure gold. The Torah had to mention the words "pure gold" here as everybody agrees that these utensils were not cast from the previously mentioned talent of gold.