An ornamental device includes: diamonds disposed on a single support element in a specific physical arrangement, all the diamonds in the specific physical arrangement having a blue fluorescent equal to or stronger than strong blue, wherein all the diamonds in the specific physical arrangement shining clear under a visible light, and shining blue under ultraviolet radiation keeping the specific physical arrangement distinguished from a group of diamonds in the specific physical arrangement, the group of diamonds comprising a mixture of a diamond or diamonds having a blue fluorescence equal to or stronger than strong blue and a diamonds or diamonds not having a blue fluorescent equal to or stronger than strong blue.