This is one of my favourite techniques using Dreamweaver stencils and black paste.
I've used the ginger jar brass stencil LG626 and have embossed on to thick vellum, then I have cut the shape out around the embossed edge. I've added powdered chalks (lime green and turquoise) and to the vellum vase which is not too easy to see on the photo but it gives the vase just a hint of colour. I have also cut out a plain white card version so stick the vellum onto it using Miracle Adhesive Film 2788.
To make the leaf decoration, I have used the leaf stencil LG616, greaseproof paper, black paste and the pallet knife. Secure the stencil to the paper using low tack tape and apply the black paste in the usual way. Peel the stencil away from the paper and wash the stencil straight away. You are left with all the leaves on the greaseproof paper. Let that dry - this can take an hour or two.
Once dry, put the stencil back over the leaves and apply a layer of glue using the Stamp and stick glue pad GLUIPAD and a finger dauber. With the stencil still in place, dab on Metallic Fix (mica powder) in any colour you like with a small stencil brush. Remove the stencil and clean. Your leaves are now ready to use.
Prepare your base card. My sample card is A6 and I have covered it with black card. I've stamped gold and grey patterned paper with Magenta 37163.H and made a little embellishment with a wooden coffee stir stick which I have coloured and decorated with peel offs.
The paper collar on the vase is made from a strip of card with frayed ends and the little square keeps everything stuck together.
Peel the finished leaves carefully away from the greaseproof paper (they are quite flexible but soft and delicate), put some PVA glue on the reverse and stick to the vellum vase. Make good use of the half leaves too and stick those to the edge of the vase to give the vase 'roundness'. Mount the vase onto the card with foam pads.
This technique only works with small solid shapes and you can make a batch and use them later. I re-use the greaseproof paper several times.