The shell looks like black lip mop....
There are many pink garnets with a variety of shades,see link....
Looks like a variety of copper and silver alloys.
Why are you scared? Australian opal cannot absorb water, acid will not harm an opal. https://blackopaldirect.com/blog/opal-myths-busted/
The back side looks like natural opal.
10 minute video hand making a filigree bracelet. [MEDIA]
Most stones can get abraded including rubies/sapphires.In the past triplet caps were made of glass,quartz and sapphire.Modern inexpensive doublets...
Unakite jasper is a false/trade name,propagated by new age/healing stones type stores.
Looks like unakite.
When we dug up hundreds of Native American pottery shards,no one wanted to even look at them.
It's a camporee patch,troops in the district get together. https://www.bsacac.org/activities/camporees/
USA Vietnam Service Medal ribbon,wonder who dropped it.
Tube,you can see the vent hole in the photos.
The knot is made of tubing.
Many museums,etc. remove collections and individual pieces for various reasons. example of process......
Older thread showing sizes of a few letter openers. https://www.antiquers.com/threads/native-american-silver-letter-opener.43085/
Maori style carving impossible to know who carved it and the material,the Chinese have carved thousands of them in a number of materials.
Start a new thread and post photos of your Japanese sword.
There are 2 types of jade,see info in link. https://www.ajsgem.com/articles/jade-jadeite-and-nephrite.html
It's not granite.
Separate names with a comma.
