To get historical gold prices lets look at the Kitco website. They have historical prices for gold dating back to 1833.
If you look at the yearly charts and data for 1833 to 1999 you can see that gold moved very little in price for the period 1833 to 1971. Gold was $20.65 an ounce in 1833 and it was $40.80 an ounce in 1971. From 1930 to 1971 gold grew in value at an annual rate of 1.7%. Before the 1970's gold saw little increase in value.
For the 1970's and later gold started to increase. From 1970 to 2008 gold grew at an average annual compound growth rate of 8.8%.
Here is a chart showing gold prices from 1970 to 2008:

The price was quite volatile over the years and saw increases in 66% of years and decreases in 33% of years. Here is a chart showing the annual percentage change in gold prices:

Gold prices are volatile and returns on gold investments have not been attractive over the years. In my opinion gold is not a solid investment. It has high risk and does not have consistent high return.
For more data on gold historic prices see the Kitco website
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