Heart pendant Necklace which changes color depending on temperature, the larger the temperature difference, the faster the color change. Mood Necklace, The color of the stone will change into blue, green, purple, black, etc. with your body temperature. Magical mood necklace, you will find that your mood also changes with the color. Material : Stainless Steel.Non-toxic, harmless, lightweight, not easy to slip off, long-term and skin contact is not allergic. Jewelry Size : Chain Length : 50 cm (19.6 in).Pendant:2.7*1.46cm, Weight:10g/pair. Use Occasion : Best friends necklace, friendship necklace, couple necklace, family necklace, mens necklace, womens necklace, teen necklace, for Dad ,Mom, Daughter, Son, Granddaughter, Aunt, Sisters, friend and Other Members. It is a perfect gift for anyone. Best birthday gifts, Christmas gifts, Valentine's day gifts, Mother's Day gifts. Product Guarantee : If you have any questions about this jewelry, please email us or leave a message on QA, we will reply you in time. receive the goods, if there is any quality problem, no reason to return, refund. thank you for your purchase. Heart pendant Necklace which changes color depending on temperature, the larger the temperature difference, the faster the color change. Mood Necklace, The color of the stone will change into blue, green, purple, black, etc. with your body temperature. Magical mood necklace, you will find that your mood also changes with the color.For your " Pretty Happiness " Fashion style ,Easy match any Clothes . It's for occasions like Party,Fashion Show,Photo,Wedding,Bridal,Prom.and so on. Suitable for wedding / engagement / prom / dinner party / birthday party / daily life,any occasion you want to be more charming. It can as a gift for a variety of festivals, such as Valentine's Day, Christmas, Wedding Anniversary, Mother's Day, Thanksgiving Day and Even Birthday. Idea : For your fiancee / wife / mother / friend .