Whilst the biblical focus was good, I felt that the lack of mention of blood diamonds, unethical conditions and lab grown diamonds was a big oversight. Although there was a cursory mention of slavery in the final chapter, it was hardly discussed at all. The book mainly focused on diamonds as a metaphor for self worth and inner value, suggesting that their value, like ours, is inherent, or 'it just is' (although this isn't true, as diamonds are so valuable due to withheld supply and De Beers marketing strategies from the 19th century onwards). I think that privileged Christians have a responsibility to think about these issues, and to bring them to the spotlight. Whilst the book does mention the importance of charity and generosity, using good exegesis to do so, I think an opportunity was missed here. Diamonds themselves are clearly not the most important point of the book, as Christianity is the main focus, but this was a little distracting for me.