This denotes the Holy nature of God. It is carefully designed to accent the neckline. 
It is our prayer that God lifts you up unto His Holy hill - Zion - where there is Holiness, Righteousness and Deliverance.
 
Exo 15:11
Who is like unto thee, O LORD, among the gods? who is like thee, glorious in holiness, fearful in praises, doing wonders?
 
Psa 2:6
And I have anointed my king upon Zion, the hill of my holiness.
 
Psa 24: 3 Who shall ascend into the hill of the LORD? or who shall stand in the place of his holiness?
 
 
The holiness of God is the most difficult of all God’s attributes to explain, partly because it is one of His essential attributes that is not shared, inherently, by man. We are created in God’s image, and we can share many of His attributes, to a much lesser extent, of course—love, mercy, faithfulness, etc. But some of God’s attributes, such as omnipresence, omniscience, and omnipotence, will never be shared by created beings. Similarly, holiness is not something that we will possess as an inherent part of our nature; we only become holy in relationship to Christ. It is an imputed holiness. Only in Christ do we “become the righteousness of God” (2 Corinthians 5:21). God’s holiness is what separates Him from all other beings, what makes Him separate and distinct from everything else. God’s holiness is more than just His perfection or sinless purity; it is the essence of His “other-ness,” His transcendence. God’s holiness embodies the mystery of His awesomeness and causes us to gaze in wonder at Him as we begin to comprehend just a little of His majesty.
 
Read more on: https://gotquestions.org/holy-holy-holy.html