lab created gemstones

[strmrdr]

Iv came across 3 types so far:
flux
Hydrothermal
Flame-Fusion

From what I have seen the flux method is used in the higher priced ones.
And is better than flame-fusion.

Where does Hydrothermal fall?

 

[valeria101]

What kind of stones?

Not all three are applicable to all syntetics...
What means 'better'?

(closer to natural imperfections, or crystal-clear, or?)
Each technique you mention has a bunch of variations for each type of material synthetized

 

[strmrdr]

Sorry,
Rubies and saphire and spinel mainly.
better is:
1: hardness, color , shading and replectivity identical to the real thing.
ie not too glassy etc
2: available eye clean or better
3: toughness - ie not weaker than than the real thing because of crystal structure or inclusions