Explanation: A simile is a figure of speech that consists in making a comparison between elements that aren't obviously related, this comparison is made using the words "like" and "as." A metaphor is also a comparison but it is direct (without using the words "like" or "as"). The given phrase isn't an example of a simile of a metaphor because it isn't comparing anything, it is just describing the veils by saying that they are made of white lace.
Both of listed literature's tools are frequently used to express the comparison between two things that could be not alike but have something in common. Neither of the options are suitable for your sentence, because there is no direct or allusional comparison.
It would show that you didn't just read something from one source and believed it. When researching it is good to read around and see different results or if the information may be the close to what you gathered elswhere etc.
