LoversKites
Brilliant_Rock
- Joined
- Nov 16, 2013
- Messages
- 1,733
Wow. Sphalerite is one amazing gem.
This species has interested me since forever. I didn't want to spend much money (me has none) and most sphalerite being sold is in larger sizes, probably because it's not lucrative to sell a small, cheap gem.
Well I found one just over a carat from The Gem Trader. I wanted a green one but Brad only had orange. This thing is very sparkly. I challenge you to find something better for $20-$30.
I have a question. In what way is the refractive index connected to dispersion?
Diamond's RI is 2.417 - 2.419
Spahlerite's RI is 2.368 - 2.371 (slightly lower)
But, Sphalerite's dispersion is almost four times higher to the diamond’s dispersion (0.156 against 0.044). They don't seem to be related at all but it's logical to think that they are related in some way. Can someone please explain?
This species has interested me since forever. I didn't want to spend much money (me has none) and most sphalerite being sold is in larger sizes, probably because it's not lucrative to sell a small, cheap gem.
Well I found one just over a carat from The Gem Trader. I wanted a green one but Brad only had orange. This thing is very sparkly. I challenge you to find something better for $20-$30.
I have a question. In what way is the refractive index connected to dispersion?
Diamond's RI is 2.417 - 2.419
Spahlerite's RI is 2.368 - 2.371 (slightly lower)
But, Sphalerite's dispersion is almost four times higher to the diamond’s dispersion (0.156 against 0.044). They don't seem to be related at all but it's logical to think that they are related in some way. Can someone please explain?