Violet Gem Bracelet : 2MM 2
It seems you pressed the correct button.
A circle is heavier than a square, and a circle is also heavier than a triangle,
so the circle is the heaviest out of the three.
Between two squares and two triangles, the two triangles are lighter.
Therefore, a triangle is lighter than a square.
So, in the end, the triangle is the lightest out of the three.
Soon, a part of the wall beneath the buttons opens, and the Violet Gem Bracelet treasure is revealed.
You take the treasure from the small space inside the opened section of the wall and secure it.
After obtaining the treasure, you leave the area.
You make your way out.
You successfully secure the treasure.
Congratulations!