What is the importance of Malabar's necklace as noted in the memoir, Wild Game: My Mother, Her Lover, and Me?

When Malabar's father, Bert, proposed to his wife, Vivienne, for the second time, he presented her with a garish necklace made of gemstones. Years later, Vivienne passed the necklace to Malabar. Throughout Adrienne's childhood, Malabar told tales about the necklace's origin and worth, assuring her daughter that the item is priceless and promising Adrienne she will someday wear it at her wedding. When Adrienne becomes engaged to Jack, Malabar says she can finally have the necklace. Adrienne is overwhelmed, realizing the necklace is a symbol of maternal affection. However, at the last moment, Malabar retracts her promise and wears the necklace herself to the wedding.

Years later, Malabar finally gives the piece to Adrienne. Adrienne hides it in her home, knowing if she appraised it and it were valuable she would sell it. She also fears discovering the necklace is worthless, knowing this truth would destroy the fantasies of her childhood. Throughout the memoir, Malabar constantly offers and retracts the necklace from Adrienne the same way she grants and thieves her daughter of her love.