Metallic gold
From Distillers Wiki
According to Irving Hirsch:
Metallic Gold In Liquors
Where the manufacturer desires his liquor to contain small bits of flocculent, floating metallic gold, this is easily accomplished by merely taking a small piece of gold leaf and shaking it up well in a small quantity of liquor, when the gold leaf will break up into many small flocculent pieces which, with the containing liquor, can be added to any batch.
Goldschlager is a commercially successful spirit which is infused with Metallic gold.
