CORNERSTONE by STYX has sold 2,100,000 copies in Canada and United States.
CORNERSTONE certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Canada |
100,000 | 1x Platinum | 1979 |
Canada Sales: 100,000
Certification / note: 1x Platinum
Certification Date / sales as of: 1979
|
 United States |
2,000,000 | 2x Platinum | 14 November, 1984 |
United States Sales: 2,000,000
Certification / note: 2x Platinum
Certification Date / sales as of: 14 November, 1984
|
| Total sales | 2,100,000 | (in 2 countries) |
Total
Sales: 2,100,000
(in 2 countries)
|
Year-end chart performance for CORNERSTONE
| Chart 1979 | Rank |
| Canadian Albums (RPM) |
44 |
| Chart 1980 | Rank |
| Canadian Albums (RPM) |
4 |
 German Albums (Offizielle Top 100) |
12 |
| US Albums (Billboard 200) |
13 |