Craig Williams' domination in the feature two-year-old races leading into the Blue Diamond has continued with the jockey taking out both Preludes at Caulfield on Catchy and Property.

Williams has been the rider of five of the top six in the latest market for the Blue Diamond in recent weeks and will now need to make the decision who he rides in the $1.5 million feature at Caulfield in two weeks.

"I'd like to wait until the barrier draw but obviously I can't wait that long," Williams said.

"I'll have the opportunity to speak to connections of the horses and have the benefit of seeing how these horses pull up on Sunday."

Along with both Preludes on Saturday, Williams also won the Chairman's Stakes on Formality and the Inglis Premier on Jukebox last Saturday while he claimed a Blue Diamond Preview on Property and was a close second in the other Preview on Tulip.

Catchy remained unbeaten from three starts when she got home by a short head over Limestone in Saturday's Group Two Prelude (1100m) for fillies to move from $8 to $6 favourite for the Blue Diamond.

"We haven't squeezed her to win this so I know there'll be gas in the tank come Blue Diamond day," co-trainer David Hayes said.

The Robert Smerdon-trained Property showed superior acceleration in the colts and geldings division to defeat Pariah by three-quarters of a length with leader Wait For No One holding third, another short head away.

Property is at $8 although he will need to be a late entry to take his place in two weeks.

Formality is at $6.50 along with Jukebox and Pariah who caught the eye with his fast-finishing second in his Melbourne debut.

Property's managing owner David Price, who is based in Hong Kong, has to decide whether to pay the $55,000 late entry with Williams saying he is one of the top contenders.

"Wow. He was impressive today," Williams said.

"I was so impressed with his acceleration."

Williams got Property into the three-wide running line with cover before the colt let down strongly.

Pariah came from behind Property to hit the line powerfully.

"He was an unlucky loser today, I feel," Pariah's jockey Kerrin McEvoy said.

"I think if you swap the barriers with the winner, we come out on top."

"He's going to be a force to be reckoned with on Diamond day."