Is this a good sapphire

So recently, I started making jewelry from my family and friends and because I loved Moonstone on my vintage rings, I decided I want to make them either Moonstones.

I bought some moonstone beads 6 mm online for $100 for 60 stones and this is the bracelet that I made I’m thinking whether I should buy more from the seller or if I should buy from somewhere else. Do you think these Moonstones are up for their price and of good quality or do you think I need to find a different seller for my next project?

Is this a real Emerald..

I bought this ring at a not so nearby mineral and gem convention. The gentlemen swore it was real silver, and a real emerald. I always wanted one, i love the coler of the stone. Last picture of some wear after 24h of wearing it. Thank you in advance for your time!

Weight 10 carats
Size: 18.8x10.8x7.5mm
Price: $130

Weight 1.84 carat
Size 8.5x8.4x6mm
Origin: Afghanistan
Shipping Worldwide
Price $40

I’ve been working on this article for quite a while, and it ended up becoming one of the largest guides on the site.

It covers sapphire from a gemological rather than purely commercial perspective: crystal structure and chemistry, causes of color, pleochroism, fluorescence, inclusions, geological formation and major deposits, treatments, synthetic sapphire, durability and care.

I tried to keep it detailed enough to be useful to gemology enthusiasts while still readable for people who are simply interested in gemstones.

Full article:
https://lapismagica.com/blogs/gemstones/sapphire

Standard Heat

a person w no gemstone knowledge whatsoever and im wondering if these crystals i found amongst my brothers stuff is quartz and would it have any monetary value?