A brazen thief has allegedly taken a diamond engagement ring from Christine Davidson just days before she passed away on Thursday . The family of a woman who battled a cancerous brain tumour for 14 years has claimed her diamond engagement ring was 'forcefully removed and stolen ' from her finger at a nursing home just days before she passed away . Christine Davidson , from Adelaide , South Australia , was diagnosed with terminal brain cancer in 2001 , and told she only had between nine months to three years to live . After enduring an incredible 14 years of chemotherapy and radiation , the mother of two lost her battle to cancer last Thursday morning at an Adelaide nursing home at the age of 61 . But four days before she died , her husband Ronny and their two daughters Symantha , 40 , and Kelly , 38 , noticed her ring was missing from her finger . 'Dad noticed the bruises around her finger and asked us if we managed to get the ring off , ' Symantha told Daily Mail Australia . 'Three weeks prior to her passing , we tried to remove the ring because it started to cut her circulation but we had no luck after trying everything we could think of. ’ The family has launched a desperate online appeal in a bid to have their mother 's ring returned . Christine Davidson ( left ) who was diagnosed with terminal brain cancer , pictured with her husband Ronny ( right ) and their daughter Symantha ( centre ) Christine and her husband Ronny were happily married for 41 years before she passed away . Kelly took to her Facebook account last Wednesday to post an emotional appeal and has since attracted more than 117,000 shares and almost 17,000 likes . 'We just do n't understand how someone could steal from a dying woman , ' Symantha said . ‘ The ring was a sign of mum and dad ’ s long lasting love and their strong marriage – they were happily married for 41 years before she passed . ‘ Mum also promised to give the ring to her only granddaughter who she was very close to - My daughter Jayda , 17 , but now she ’ s devastated . ' Christine was working at an insurance company before her sickness came on suddenly 14 years ago . Christine , who fell suddenly ill 14 years ago , pictured with her grandchildren last Christmas . On March 28 , the family was told their mother , grandmother and wife was on her 'final stage of life ' . ‘ She was a nanna to four amazing grandchildren and she was the best mum we could ever ask for , ' Symantha said . 'The last 14 years was hard on our family because we were forced to watch her suffer but we 're happy she 's at peace now and she ’ s not in pain anymore . ‘ Multiple neurosurgeons were blown away with what she had accomplished after she fought hard to kick the rare long-lasting tumour - she was a brave fighter . ' Christine was diagnosed with terminal brain cancer and was told she only had up to three years to live . Symantha said she has informed the police about the missing ring . Daily Mail Australia has contacted South Australian police for comment . Christine lived at the retirement home , which the family has asked Daily Mail Australia to keep anonymous , for more than four years . 'The majority of the nurses were fantastic and mum was cared for very well , ' Kelly said . Jewellery store SA Gold Diggers in Salisbury , South Australia has offered a $ 1000 reward for anyone providing information that leads to finding the missing ring . ‘ The generosity and kindness of people everywhere has absolutely blown us away , ’ Symantha said . Kelly and Symantha 's mother Christine ( pictured ) during her younger years where she was riding a camel . The family of Christine Davidson ( pictured ) have paid an emotional tribute to their amazing mother and wife .
Christine Davidson lost her battle to cancer at an Adelaide nursing home . Her diamond ring was last seen three weeks before she passed away . The family has claimed a brazen thief is behind the missing ring . The 61-year-old wanted to hand her ring down to her only granddaughter . The family have launched an emotional public appeal to get her ring back . A local jewellery store has offered a $ 1000 reward for anyone providing information that leads to finding the missing ring .