Green sandalwood is generally more expensive than ebony. This is due to several factors that contribute to its higher value in the market.

Firstly, green sandalwood is a rare and protected species, making it more difficult to source and harvest. It is native to certain regions in India, Indonesia, and Australia, and its overharvesting has led to it being listed as an endangered species. The rarity and conservation status of green sandalwood drive up its price significantly. In contrast, ebony is more commonly available and is not as heavily regulated, although it is also protected in some regions.

Secondly, the quality and scent of green sandalwood are highly prized. It is known for its rich, sweet, and aromatic fragrance, which is highly sought after in the production of incense, perfumes, and traditional medicines. The unique properties of green sandalwood make it a luxury item, further increasing its cost. Ebony, while also valued for its dark, dense wood, does not command the same premium price due to its more widespread availability and less distinctive characteristics.

Data from the International Union for Conservation of Nature (IUCN) and the CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) indicate that the trade of green sandalwood is strictly regulated to protect the species. This regulation, combined with the high demand for its aromatic properties, has led to a substantial price increase. For instance, the price of green sandalwood essential oil can range from $100 to $500 per milliliter, depending on its purity and source. In comparison, ebony wood can be purchased for a fraction of this cost, with prices typically ranging from $10 to $50 per kilogram.

Additionally, the craftsmanship required to work with green sandalwood is often more intricate and time-consuming than that required for ebony. This adds to the overall cost of products made from green sandalwood, such as furniture, musical instruments, and decorative items. Ebony, while also used for high-quality craftsmanship, is more commonly found in mass-produced items, which keeps its price lower.

In conclusion, green sandalwood is more expensive than ebony due to its rarity, conservation status, unique aromatic properties, and the craftsmanship involved in its use. The data from conservation organizations and the price differences in the market further support this assertion.