Quality:

John Sinkankas - American gemologist. Article “John Sinkankas” in English Wikipedia has 31.2 points for quality (as of July 1, 2025).
The article contains 9 references and 9 sections.
Since the creation of article “John Sinkankas”, its content was written by 27 registered users of English Wikipedia and edited by 27 registered Wikipedia users in all languages.
The article is cited 7 times in English Wikipedia and cited 7 times in all languages.
The highest Authors Interest rank from 2001:
- Local (English): #38178 in October 2012
- Global: #230682 in October 2012
The highest popularity rank from 2008:
- Local (English): #1783423 in June 2013
- Global: #3141173 in June 2013
There is 1 language version for this article in the WikiRank database (of the considered 55 Wikipedia language editions).
The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).