Video tutorial on how to make the QT Rose: http://www.youtube.com/watch?feature=player_embedded&v=EBwBb7PnhQo
Instructions on how to make roses can be found on http://www.bloom4ever.com/howto-origami-rose.php,
For instructions on this particular model, visit http://www.bloom4ever.com/origami-calyx-standard.php
Here's a Link to the tutorial on an origami vase: http://www.youtube.com/watch?v=ZrdYAv1DQiE
You may use any kind of paper to fold the jewelry rose flower (*it is easier if the front and the back side of the paper are slightly different whether it be in texture or color).
Tips: Take care of your folds at the beginning, and the rest should be fairly easy if you follow the tutorial exactly. Making careful folds, and making sure everything is properly aligned will allow you to get best results for the final product. This rule is something that should probably be kept in mind when making any origami model. Other than that, have fun!