Two Coloured Stone

After spending some time on the second, third, and fourth floors, Yu 

Nianzhen and Jiang Yue arrived on the fifth floor.

This floor had the least number of stones but the displays were the most elaborate.

When he saw this, Jiang Yue sighed and shook his head.

At first, they thought the quality of stones improved with the increase in floor number.

However, after walking four floors, Yu Nianzhen and Jiang Yue knew the quality of the stones was the same. 

The only difference between the stones on the first floor and those on the fifth was appearance.

As the floor number increased, the appearance of the stones became more gorgeous.

"Let's look around." Jiang Yue said and led his husband to one of the display tables.

[Is there any reaction from the compass?] Yu Nianzhen asked.

[Not yet.]

[Okay.]

As they transmitted to each other, they arrived in front of a display cabinet.