Perhaps the worlds most valuable collection of seashells has been put on display at Seashell near Rawai Beach on the islands southwestern shores. The emphasis is on shells from Phuket and Thai waters, which are among the most sought-after by collectors, however shells from every part of the world are featured. Wherever they originate, each shell in the Shell Museum is the best of its type – very often the only of its type. Displays have been created in a logical order, and visitors can see at once differing characteristics among related species. There are numerous rarities and freaks including the worlds largest golden pearl (140 karats), large sections of sedimentary rock containing shell fossils that represent the earths earliest life-forms, and a shell that weighs 250 kilograms.