See the images

 I learned the hard way as to how to take better pictures.  It took me a year to figure out what is important and what is just marketing to sell there stuff and its no use.

• What do you need in order to get good pictures
• What kind of light is important

Basic steps in order to get good jewelry and other item picture is day light but it doesn't mean that you take it in day light outside your house. Daylight means taking pictures inside the shaded area but without the flashes and tungsten light.  You save energy and you get better pictures. 

Keep gold on white and silver on black so both don't get difuse into each other.  Buy a softbox or tent box to take the picture inside it but if you don't want to buy then thats fine.  Take a see through fabric on top of the camera and the item so day light goes through it and then take the picture.  The image will be clear and the background will come awesome.

Use photoshop to edit your item to give xtra finishing touch to it.

• How to use Photoshop

Open the image in the photoshop then click on the Image -> Adjustment -> Curve -> adjust the curve up and down to see the affect on the image and select the best curve style and save the image as JPEG. 

I hope my guide helps you to better understand the use of the camera to get better image.