Yes, Trie had, on at least one occasion, given the first lady a pearl necklace; which may or may not be important. What's surely significant, though, is the level of familiarity between Mrs. Clinton and Trie's wife as indicated by his testimony.
"(Trie) said that Mrs. Clinton personally led an impromptu tour of the White House living quarters after recognizing Trie's wife among a group of Chinese visitors in 1995." (The Los Angeles Times -- Feb. 6, 2000)
The White House living quarters have always been regarded by the first lady as the Clintons' inner sanctum -- restricted to all but the most highly trusted allies and first family friends. It's unthinkable that Mrs. Clinton would have invited Charlie Trie's wife for a tour of her residence without knowing both her and her husband very well, including the fact that Trie himself was not particularly wealthy.
Would that be the ZZ Top Definition of Pearl necklace?