@High Seas,
Gov PErry's mitts are all over the "Creationist" supplemental resources that may be forwarded , or else the proposal will be defeated out of embarrasment.
As I said before, even Bush was smart enough to keep his personals to himself until AFTER he was elected president.
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As far as geology and ID, I think geo is one of the easiest disciplines to comport with ID beliefs. ID mostly goes along with the age of the earth as science states and they "Believe" in the strat record and earth structures, so there arent many points of argument between the IDers and geo. Its all in the interpretation of how things arrived on the planet. They say that each appearnace is a unique footprint of divine intervention (Or at least intelligent intervention) Most science arrives at a concluison that had there been ANY intervention , it was about the most incompetent "Design" ever. IDers dont like "Evolutionary trial balloons" it mucks up their waters
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PEridotite ROCKS, often contain peridot MINERALS, but mostly contain minerals such as olivine,pyroxenes , and micas. Olivine is the close relative of periidot(which is actually a form of tourmaline).When peridotites erode and alter , they are called SERPENTINE
Kimberlites are ocean mantle relics that form where subductive zones, island arcs or continental collisons have occured and the presence of peridot mineral gives this diamond away as being most likely from the AFrican fields of S A and Botswana.
Other kimberlites are examnined for specific types of garnets (called uvarovites) to see whether they may contain diamonds. Thats what these guys in Canada were doing for about 10 years .Kimberlites are pof various ages and have footprints that distinguish the temperatures and their "Zipper cousins" from across the oceans
In the US for example, the Kimberlites of the Apppalachian belt mostly lie out in the Ohio PA W Va margins and correspond to similar types from the Atlas Mountains and East.
Diamonds , as SHirey said, act like a good "thermos bottle" to keep all the decay products inside the crystal, so all the decay products from U/Th and U/Hf are safely inside. Im sure that the date wasnt 3 Billion years (It was probably rounded off from some compound number with a large error bar)
I have no idea what diamonds with inclusions are worth. Mostly they are "Imperfections", anyway, diamonds are only worth something because cartels keep the bulk of them off the market.