(White gold vs. Platinum)
White gold is Platinum , right? No
White gold has more price than gold twice time.
Why does it cheaper than gold? Because White Gold don't have 100% ingredient.
(White gold)
White gold = Gold + White ingredient (Silver or Plaladium) We saw white gold show 90& or 75% or etc.
Example
Yellow gold 90% = Gold 90% + Copper or Zinc 10%
White gold 90% = Gold 90% + Silver or Phaladium 10%
That show White gold include gold inside but combine with other ingredient.
In the past , They used Nickel combine with White gold.
But Nowadays they don't use it because Nickel react with skin human that make itch for human.
In the present, They coat white gold with Rhodium that really like White gold.
White gold coat with Rhodium which see really white.
Naturally White Gold colour is Gray white but Rhodium colour is White and Strong.
How to keep it?
White gold have to coat with Rhodium around 12 - 18 months.
Gold or White gold is expensive?
It about contain or % of Gold use.
If Gold and White Gold has the same %
White Gold 75% more expensive Than Gold 75% because of Silver and Plaladium which combine in White Gold is more expensive than Copper and Zinc which combine in Gold.
(Platinum)
Platinum is White Metal (95%) which root language is Platina it's mean small Silver.
Platinum is discovered in small piece.
Where can we discover?
Russian Cannada and South Africa.
Platinum isn't very storng so it doesn't has crystal which be sharp.
We use it for new technology Example surgeon instrument because it doesn't rust.
Normally they like to use it for accesory because of Platinum has long period white colour (Not Gray or Black) so they don't coat Platinum with Rhodium like White Gold.
Platinum has more weight than gold in the same quality when you wear it , you fell about weight suddenly.
Platinum is more expensive than gold twice time but Platinum doesn't has stable valueable when you wear it for a long time value of Platinum will go down.
How can you seperate White gold and Platinum?
Exactly White gold has gray white colour but if they coat with Rhodium they look similar Platinum
Conclusion White gold is more expensive than Gold and White gold has stable valuable
Suggestion If you see it old , you can go to jewelry shop and coat them with Rhodium