Glossary entry (derived from question below)
English term or phrase:
post formation
English answer:
after formation
English term
post formation
The resulting color is both permanent and stable.
Tanzanite is often mined already blue-violet, attributed to a ****post formation (585 million years ago) natural heating event****.
The molecular structure and chemical composition of tanzanite mined blue-violet and tanzanite which has been heated, is identical.
From a gemmological point of view, heated blue-violet tanzanite has no distinction from unheated tanzanite; hence, tanzanite is not technically considered a ‘treated’ gemstone.
Would you please explain or rephrase "post formation" in the phrase "post formation natural heating event". Isn't the phrase "post formation natural heating event" somewhat grammatically incorrect? Might be an easy question for native English speakers. Thanks in advance!
| 5 +4 | after formation |
Teresa Reinhardt
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Jun 15, 2012 15:51: Teresa Reinhardt Created KOG entry
Non-PRO (1): B D Finch
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United States
Known for top notch work, on time
Native in: German (Variant: Germany) 
, English (Variant: US)
Works in: German to English, English to German, English, and 1 more.
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