Sedimentary rocks are millions of years old, as they take millions of years to form. Gemstones and petrified wood also takes millions of years to form. These are all proof of the old age of the earth.
The Facts Are .....
A metal hammer, with its fossilized wooden handle, has been found in sandstone at Paluxy River (Texas, USA). The sandstone has been dated as being 400 million years old. This is 399 million years before the first human is supposed to have evolved. Also found inside rock has been a pair of pliers, a bolt, and a set of car keys.    
A petrified orange has been found in a creek near Gayndah (Queensland). The orange cannot be more than about 25 years old, as the first oranges were not produced in the area until 1968. This short period of time for an organic object to turn into rock nullifies the evolutionary hypothesis that millions of years are required for the process to occur. 
A felt hat left in a spray mine in Tasmania (Australia) was found 50 years later. The minerals in the water that covered the hat had turned the hat to stone. 
Recent research has shown that diamonds may not take millions of years to form. They are believed to form rapidly, rising from a depth of 150-250 Km, taking just 8-25 hrs to form. 
Australia's CSIRO Division of Material Science succeeded in producing opals in the laboratory over time-spans less than a generation. Similar success has been achieved by researchers in Japan. The theory that geologic processes take millions of years is not supported by these developments.
Perfect opals have been produced in a laboratory in Lightning Ridge (NSW) by Dr Len Cram.
A bowler hat was buried in the volcanic eruption of Te Wairoa village (North Island, New Zealand) on June 10, 1886. It was discovered 20 years later, and found to have turned to stone. A leg of ham had also been petrified after being buried in the same catastrophe. 
In the 1780's a Maori chief was buried by being placed in a burial cave at Cavern Head (NZ). The remains of the chief were discovered by Walter Traill in 1877, and were found to have turned to stone. 
Rocks composed of iron-rich limestone, sand and mud are forming in a Norfolk (UK) marsh in as short a time as 6 months. The limestone which cements the material together is being created by bacteria which are thriving on the rotting vegetation. Rocks do not necessarily take millions of years to form, nor do the fossils within them. 
Fuming volcanoes are known to produce around 500 gm of gold per day in the fluids coming out of them. This is the equivalent of 18 tonnes of gold per century from just one volcano. 
- Creation Ex Nihilo, Vol. 6, No. 3, 1984 p:16;
- Creation Ex Nihilo, Vol. 14, No. 1, 1992 p:20;
- Creation Ex Nihilo, Vol. 8, No. 3, 1986 p:10;
- Creation Ex Nihilo, Vol. 17, No. 1, 1995 p:45 [photographs included]
- Creation Ex Nihilo, Vol. 10, No. 1, 1988 p:11 [photographs included]
- Creation Ex Nihilo, Vol. 8, No. 3, 1986 p:10 [photo included]
- Geoscience Canada, Vol 18, No. 1, 1991 p:1-16
- Nature Vol. 204, No. 4964, 1964 p:1151-1153;
- The Australian Gemmologist, No. 66, 1966 p:5-9;
- Australasian Post, February 6, 1988 p:18-20
- Creation Ex Nihilo, Vol. 12, No. 1, 1990 p:10-15;
- Creation Ex Nihilo, Vol. 17, No. 1, 1995 p:14-17
- Creation Ex Nihilo, Vol. 8, No. 3, 1986 p:10 [photos included]
- Creation Ex Nihilo, Vol. 8, No. 3, 1986 p:10
- Eastern Daily Press (UK), October 5, 1994
- New Scientist, November 5, 1994 p:6