Like Dick above mentioned, this is a piece of Yew, NOT Juniper aka Eastern Red Cedar.
And yes all parts of the Yew are poisonous, except the soft meat of the fruit on the female plant, so do not eat the wood , wood dust is not healthy of any wood, so wear a mask.
I have turned a bunch of Yew,and have pictures of it, but can’t find one of the freshly turned wood, the colors are really different from Juniper aka Easter Red Cedar when fresh.
Juniper is a vivid purplish red color that will become a dull brown, I will add the picture of a piece fresh and as it is now, the Yew is a more orange color when fresh and turns a dark color as you can see in the picture of these pieces.
Juniper.jpg Juniper now.jpg
Yew pieces
Yew turnings.jpg Yew root burl and top.jpg
The Yew I polished and finished with Carnauba wax.