Big brooch and broken bracelet!

I did post these on another site but didn't get much response...the brooch is big,approx 5 cms by 5 and a half.
It's on porcelain...I louped and couldn't see dots but it's probably transfer,isn't it? It says ROLLED near the hinge, so it's not solid.

I thought this bracelet may be jet but the other site said no...does anyone have any idea what it could be? It leaves a brownish mark on tiles.

 

I do not understand **sigh** how or why some pics are here a few times

sorry all x x

 

Definitely not jet. Probably bog oak, but others are more familiar with that.
Here is info on jet-like materials:
http://www.jewelrynerd.org/1/post/2...anite-jewelry-and-how-do-i-identify-them.html

 

Wonder if it's just wood maybe? Many thanks for your reply!

Had a quick look at that site,and have bookmarked for a better look later x

 

...though bog oak looks like a possibility

 

Rolled gold is a type of plating done in the 1800s to early 1900s. Thicker than today's plating.

 

Rolled gold is still used here. It's not strictly plating, it is literally bonding gold onto a base substrate using heat. So, it's a physical process as opposed to plating.

 

That's interesting, I didn't know heat was used ... so much to learn!!

 

The image is printed on. If I were going to take a wild guess I'd say 1910s or so on the pin. The bracelet may be older. Someone replaced the elastic at least once, and it looks like it's been through the wars.

 

Wonder if the bracelet is just wood? x

 

Could be, with some kind of black Japanning maybe (looks like lacquer).

 

Does definitely have something on it...many thanks for your help x x x

 

Gutta percha?

 

Is that the stuff that goes brownish? xx

 

On of 'em. Vulcanite is even better at it; that's natural rubber.

 

Oh I think that was the one I thought it was

 

The porcelain miniature is some version of Jupiter in the Guise of Diana Seducing Callisto.

Wondering if the bracelet might be bois durci?

 

One of the things I considered as well, but I've never seen bois durci crack and flake like that. It has no grain, since it is ground wood mixed with blood, gelatin and egg white.

 

Victorian MDF! Medium Density Fiberboard, made of wood remnants and a couple of binders. It's used in furniture mostly.

 

(My laptop *got* broken ( suspect the pup stood on it ) and need a new keyboard...am on my old lappy atm and it's soooo slow)
I hadn't see the newer responses,thank you all!

I had never heard of bois durci, so I did a check and I have some of that! Don't know where but I know I have some...really appreciate the time you have all taken to help me learn x x x