Chick eggs

[Rose Quartz]

Medium brown
Medium brown but I carnt see any dark Mark's or veins when I candle them.

Ok, wait till day 10 then, give them a good long look. By day 10 you should be able to see movement and shadows too if there's anything going on inside. If not then they're either not fertilized, or there could be something wrong with the incu.

 

[JaeG]

Brown eggs are hard to see into - I was cursing at my cream coloured ones last time I hatched some (having just incubated white Muscovy eggs which were easy to see into). You need a strong light and a very dark room.

This is a good candling article but remember the author has used a white shelled egg so the embryo and veining are easier to see, and a very strong candling light. Brown eggs make it a lot trickier to spot what's going on as does a weaker light source.
https://www.backyardchickens.com/articles/development-of-a-chicken-embryo-day-by-day.72537/

The egg will get darker inside the further along incubation is so hopefully you might be able to see some change in the next few days. From day 10 onwards this becomes noticeable.

Here's another article and you can see how the shadow really grows from day 10 onwards.
https://www.backyardchickens.com/ar...ion-through-incubation-of-chicken-eggs.47879/